From 51e862d1411be2741d306b5d02d441c5fdd02d37 Mon Sep 17 00:00:00 2001
From: Roman Stoklasa <rstoki@seznam.cz>
Date: Wed, 15 Dec 2021 15:43:04 +0100
Subject: [PATCH 1/3] Added .gitignore and ignoring *.user (project and CMake)
 files

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .gitignore

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d7a4d4d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/*.user

From 59283ab186aef75e718ba8234f4229c2b4473f67 Mon Sep 17 00:00:00 2001
From: Roman Stoklasa <rstoki@seznam.cz>
Date: Wed, 15 Dec 2021 15:44:28 +0100
Subject: [PATCH 2/3] Added new toolbar icons -- for selecting the color mode.
 Added icons to color actions.

---
 artwork/icon-bgr.svg       |  50 +++++++++
 artwork/icon-colormap.svg  |  61 +++++++++++
 artwork/icon-greyscale.svg |  54 ++++++++++
 artwork/icon-rgb.svg       |  50 +++++++++
 icons.qrc                  |   4 +
 mainwindow.ui              | 202 ++++++++++++++++++++-----------------
 6 files changed, 331 insertions(+), 90 deletions(-)
 create mode 100644 artwork/icon-bgr.svg
 create mode 100644 artwork/icon-colormap.svg
 create mode 100644 artwork/icon-greyscale.svg
 create mode 100644 artwork/icon-rgb.svg

diff --git a/artwork/icon-bgr.svg b/artwork/icon-bgr.svg
new file mode 100644
index 0000000..6bb3386
--- /dev/null
+++ b/artwork/icon-bgr.svg
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+<circle style="fill:#D80027;" cx="355.225" cy="341.5" r="156.775"/>
+<circle style="fill:#006DF0;" cx="255.53" cy="170.5" r="156.775"/>
+<circle style="fill:#91DC5A;" cx="156.775" cy="341.5" r="156.775"/>
+<path style="fill:#FFFFFF;" d="M399.023,199.001c0,0-100.395-13.715-143.023,21.116c-42.88-35.039-142.023-21.116-142.023-21.116
+	s34.389,98.73,86.343,118.271c-8.463,54.14,55.184,124.018,55.681,124.018c0.499,0,64.229-70.123,55.621-124.374
+	C363.214,297.131,399.023,199.001,399.023,199.001z"/>
+<path style="fill:#EA348B;" d="M256,220.117c14.291,11.678,26.754,26.087,36.53,43.019c9.888,17.128,16.168,35.347,19.092,53.78
+	c51.591-19.786,90.066-66.045,98.784-122.155C357.575,174.829,298.627,185.286,256,220.117z"/>
+<path style="fill:#99EFF2;" d="M311.624,316.916c-17.426,6.683-36.343,10.356-56.121,10.356c-19.423,0-38.015-3.54-55.182-9.999
+	c-8.463,54.14,12.08,110.071,55.681,145.633C299.699,427.266,320.232,371.167,311.624,316.916z"/>
+<path style="fill:#FFDA44;" d="M200.32,317.272c2.9-18.554,9.198-36.898,19.152-54.136c9.774-16.932,22.238-31.339,36.529-43.019
+	c-42.88-35.039-102.273-45.415-155.344-25.003C109.535,251.405,148.367,297.731,200.32,317.272z"/>
+<path style="fill:#FFFFFF;" d="M256,220.117c-14.291,11.678-26.753,26.087-36.529,43.019c-9.952,17.24-16.251,35.584-19.152,54.136
+	c17.167,6.458,35.759,9.999,55.182,9.999c19.778,0,38.695-3.671,56.121-10.356c-2.926-18.434-9.204-36.653-19.092-53.78
+	C282.756,246.204,270.292,231.797,256,220.117z"/>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
diff --git a/artwork/icon-colormap.svg b/artwork/icon-colormap.svg
new file mode 100644
index 0000000..1f89d64
--- /dev/null
+++ b/artwork/icon-colormap.svg
@@ -0,0 +1,61 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+<path style="fill:#D8D8DA;" d="M256,0C114.615,0,0,114.615,0,256s114.615,256,256,256s256-114.615,256-256S397.385,0,256,0z
+	 M256,336.842c-44.648,0-80.842-36.194-80.842-80.842s36.194-80.842,80.842-80.842s80.842,36.194,80.842,80.842
+	S300.648,336.842,256,336.842z"/>
+<path style="fill:#D4B6E6;" d="M282.947,188.632h220.076C485.09,122.726,441.507,67.394,383.64,34.044L229.053,188.632H282.947z"/>
+<path style="fill:#EBAFD1;" d="M229.053,188.632L383.639,34.044C346.068,12.39,302.482,0,256,0c-23.319,0-45.899,3.135-67.368,8.978
+	v220.075L229.053,188.632z"/>
+<path style="fill:#E07188;" d="M188.632,229.053V8.978C122.726,26.91,67.394,70.493,34.045,128.36l154.586,154.588V229.053z"/>
+<g>
+	<polygon style="fill:#D8D8DA;" points="188.632,229.053 229.053,188.633 282.947,188.633 282.947,188.632 229.053,188.632 	"/>
+	<polygon style="fill:#D8D8DA;" points="229.053,323.367 188.632,282.947 229.053,323.368 282.947,323.368 323.368,282.947 
+		282.947,323.367 	"/>
+</g>
+<path style="fill:#B4D8F1;" d="M503.024,188.632H282.947v0.001h0.958l39.463,40.42L477.955,383.64
+	C499.611,346.068,512,302.482,512,256C512,232.681,508.865,210.099,503.024,188.632z"/>
+<path style="fill:#ACFFF4;" d="M323.368,282.947v220.075c65.905-17.932,121.238-61.517,154.586-119.382L323.368,229.053V282.947z"/>
+<path style="fill:#95D5A7;" d="M282.947,323.368L128.361,477.956C165.932,499.61,209.518,512,256,512
+	c23.319,0,45.899-3.135,67.368-8.977V282.947L282.947,323.368z"/>
+<path style="fill:#F8E99B;" d="M229.053,323.368H8.976C26.91,389.274,70.493,444.606,128.36,477.956l154.588-154.588H229.053z"/>
+<path style="fill:#EFC27B;" d="M188.632,282.947L34.045,128.36C12.389,165.932,0,209.518,0,256c0,23.319,3.135,45.901,8.976,67.368
+	h220.076L188.632,282.947z"/>
+<polygon style="fill:#D8D8DA;" points="283.905,188.633 282.947,188.633 323.368,229.053 "/>
+<path style="fill:#B681D5;" d="M503.024,188.632C485.09,122.726,441.507,67.394,383.64,34.044L256,161.684v26.947h26.947H503.024z"
+	/>
+<path style="fill:#E592BF;" d="M383.639,34.044C346.068,12.39,302.482,0,256,0v161.684L383.639,34.044z"/>
+<path style="fill:#80CB93;" d="M256,350.316V512c23.319,0,45.899-3.135,67.368-8.977V282.947l-40.421,40.421L256,350.316z"/>
+<polygon style="fill:#F6E27D;" points="282.947,323.368 256,323.368 256,350.316 "/>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
diff --git a/artwork/icon-greyscale.svg b/artwork/icon-greyscale.svg
new file mode 100644
index 0000000..437c0de
--- /dev/null
+++ b/artwork/icon-greyscale.svg
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 460 460" style="enable-background:new 0 0 460 460;" xml:space="preserve">
+<g id="XMLID_1637_">
+	<g id="Sheet">
+		<path id="XMLID_2189_" style="fill:#F2F2F2;" d="M354.688,7.322l67.99,67.99C427.366,80.001,430,86.359,430,92.99V420
+			c0,22.091-17.909,40-40,40H70c-22.091,0-40-17.909-40-40V40C30,17.909,47.909,0,70,0h267.01
+			C343.641,0,349.999,2.634,354.688,7.322z"/>
+		<path id="XMLID_2185_" style="fill:#D2D6D5;" d="M350,120h80v300c0,22.091-17.909,40-40,40H70c-22.092,0-40-17.909-40-40V40
+			C30,17.909,47.908,0,70,0h240v80C310,102.091,327.908,120,350,120z"/>
+		<path id="XMLID_2183_" style="fill:#AAAFAD;" d="M350,120h80v30l-70.298-17.575C354,131,350,125.877,350,120z"/>
+	</g>
+	<g id="Color_rouds">
+		<path id="XMLID_1579_" style="fill:#9CA09E;" d="M230,332.887c-29.133,0-52.75-23.678-52.75-52.887s23.617-52.887,52.75-52.887
+			s52.75,23.678,52.75,52.887S259.133,332.887,230,332.887z"/>
+		<path id="XMLID_1168_" style="fill:#F2F2F2;" d="M370,280c0,44.183-35.817,80-80,80c-23.902,0-45.341-10.495-60-27.113
+			c12.439-14.101,20-32.606,20-52.887s-7.561-38.786-20-52.887C244.659,210.495,266.098,200,290,200
+			C334.183,200,370,235.817,370,280z"/>
+		<path id="XMLID_1167_" style="fill:#3C3B42;" d="M210,280c0,20.281,7.561,38.786,20,52.887C215.341,349.505,193.902,360,170,360
+			c-44.183,0-80-35.817-80-80s35.817-80,80-80c23.902,0,45.341,10.495,60,27.113C217.561,241.214,210,259.719,210,280z"/>
+	</g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
diff --git a/artwork/icon-rgb.svg b/artwork/icon-rgb.svg
new file mode 100644
index 0000000..b821653
--- /dev/null
+++ b/artwork/icon-rgb.svg
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 512 512" style="enable-background:new 0 0 512 512;" xml:space="preserve">
+<circle style="fill:#006DF0;" cx="355.225" cy="341.5" r="156.775"/>
+<circle style="fill:#D80027;" cx="255.53" cy="170.5" r="156.775"/>
+<circle style="fill:#91DC5A;" cx="156.775" cy="341.5" r="156.775"/>
+<path style="fill:#FFFFFF;" d="M399.023,199.001c0,0-100.395-13.715-143.023,21.116c-42.88-35.039-142.023-21.116-142.023-21.116
+	s34.389,98.73,86.343,118.271c-8.463,54.14,55.184,124.018,55.681,124.018c0.499,0,64.229-70.123,55.621-124.374
+	C363.214,297.131,399.023,199.001,399.023,199.001z"/>
+<path style="fill:#EA348B;" d="M256,220.117c14.291,11.678,26.754,26.087,36.53,43.019c9.888,17.128,16.168,35.347,19.092,53.78
+	c51.591-19.786,90.066-66.045,98.784-122.155C357.575,174.829,298.627,185.286,256,220.117z"/>
+<path style="fill:#99EFF2;" d="M311.624,316.916c-17.426,6.683-36.343,10.356-56.121,10.356c-19.423,0-38.015-3.54-55.182-9.999
+	c-8.463,54.14,12.08,110.071,55.681,145.633C299.699,427.266,320.232,371.167,311.624,316.916z"/>
+<path style="fill:#FFDA44;" d="M200.32,317.272c2.9-18.554,9.198-36.898,19.152-54.136c9.774-16.932,22.238-31.339,36.529-43.019
+	c-42.88-35.039-102.273-45.415-155.344-25.003C109.535,251.405,148.367,297.731,200.32,317.272z"/>
+<path style="fill:#FFFFFF;" d="M256,220.117c-14.291,11.678-26.753,26.087-36.529,43.019c-9.952,17.24-16.251,35.584-19.152,54.136
+	c17.167,6.458,35.759,9.999,55.182,9.999c19.778,0,38.695-3.671,56.121-10.356c-2.926-18.434-9.204-36.653-19.092-53.78
+	C282.756,246.204,270.292,231.797,256,220.117z"/>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+<g>
+</g>
+</svg>
diff --git a/icons.qrc b/icons.qrc
index ae54111..b89e90d 100644
--- a/icons.qrc
+++ b/icons.qrc
@@ -5,5 +5,9 @@
         <file>artwork/document-save.svg</file>
         <file>artwork/histogram.svg</file>
         <file>artwork/icon.svg</file>
+        <file>artwork/icon-rgb.svg</file>
+        <file>artwork/icon-bgr.svg</file>
+        <file>artwork/icon-colormap.svg</file>
+        <file>artwork/icon-greyscale.svg</file>
     </qresource>
 </RCC>
diff --git a/mainwindow.ui b/mainwindow.ui
index e82e253..2b22e6b 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -19,43 +19,43 @@
   </property>
   <widget class="QWidget" name="centralWidget">
    <layout class="QGridLayout" name="gridLayout_2">
-       <item row="1" column="0">
-           <widget class="QLabel" name="batchLabel">
-               <property name="text">
-                   <string>Batch index (n)</string>
-               </property>
-           </widget>
-       </item>
-       <item row="5" column="0" colspan="2">
-           <widget class="QGraphicsView" name="imageCanvas">
-               <property name="enabled">
-                   <bool>false</bool>
-               </property>
-               <property name="mouseTracking">
-                   <bool>true</bool>
-               </property>
-               <property name="interactive">
-                   <bool>false</bool>
-               </property>
-               <property name="dragMode">
-                   <enum>QGraphicsView::NoDrag</enum>
-               </property>
-           </widget>
-       </item>
-       <item row="2" column="0">
-           <widget class="QSlider" name="batchSlider">
-               <property name="enabled">
-                   <bool>false</bool>
-               </property>
-               <property name="maximum">
-                   <number>1</number>
-               </property>
-               <property name="orientation">
-                   <enum>Qt::Horizontal</enum>
-               </property>
-           </widget>
-       </item>
-       <item row="4" column="0" colspan="2">
+    <item row="1" column="0">
+     <widget class="QLabel" name="batchLabel">
+      <property name="text">
+       <string>Batch index (n)</string>
+      </property>
+     </widget>
+    </item>
+    <item row="5" column="0" colspan="2">
+     <widget class="QGraphicsView" name="imageCanvas">
+      <property name="enabled">
+       <bool>false</bool>
+      </property>
+      <property name="mouseTracking">
+       <bool>true</bool>
+      </property>
+      <property name="interactive">
+       <bool>false</bool>
+      </property>
+      <property name="dragMode">
+       <enum>QGraphicsView::NoDrag</enum>
+      </property>
+     </widget>
+    </item>
+    <item row="2" column="0">
+     <widget class="QSlider" name="batchSlider">
+      <property name="enabled">
+       <bool>false</bool>
+      </property>
+      <property name="maximum">
+       <number>1</number>
+      </property>
+      <property name="orientation">
+       <enum>Qt::Horizontal</enum>
+      </property>
+     </widget>
+    </item>
+    <item row="4" column="0" colspan="2">
      <widget class="QSlider" name="channelSlider">
       <property name="enabled">
        <bool>false</bool>
@@ -80,10 +80,10 @@
       </property>
      </widget>
     </item>
-       <item row="3" column="0">
-           <widget class="QLabel" name="channelLabel">
-               <property name="text">
-                   <string>Channel (c)</string>
+    <item row="3" column="0">
+     <widget class="QLabel" name="channelLabel">
+      <property name="text">
+       <string>Channel (c)</string>
       </property>
      </widget>
     </item>
@@ -95,7 +95,7 @@
      <x>0</x>
      <y>0</y>
      <width>599</width>
-     <height>22</height>
+     <height>21</height>
     </rect>
    </property>
    <widget class="QMenu" name="menuFile">
@@ -116,7 +116,7 @@
      </property>
      <addaction name="order_H_W_C"/>
      <addaction name="order_C_H_W"/>
-        <addaction name="order_automatic"/>
+     <addaction name="order_automatic"/>
     </widget>
     <widget class="QMenu" name="menuColor">
      <property name="title">
@@ -127,16 +127,16 @@
      <addaction name="color_RGB"/>
      <addaction name="color_BGR"/>
     </widget>
-       <widget class="QMenu" name="menuContrast_stretch">
-           <property name="title">
-               <string>Contrast stretch</string>
-           </property>
-           <addaction name="contrast_array"/>
-           <addaction name="contrast_canvas"/>
-       </widget>
+    <widget class="QMenu" name="menuContrast_stretch">
+     <property name="title">
+      <string>Contrast stretch</string>
+     </property>
+     <addaction name="contrast_array"/>
+     <addaction name="contrast_canvas"/>
+    </widget>
     <addaction name="menuMode"/>
     <addaction name="menuColor"/>
-       <addaction name="menuContrast_stretch"/>
+    <addaction name="menuContrast_stretch"/>
    </widget>
    <addaction name="menuFile"/>
    <addaction name="menuSettings"/>
@@ -173,6 +173,12 @@
    <addaction name="actionExport_as_PNG"/>
    <addaction name="actionHistogram"/>
    <addaction name="actionconvert"/>
+   <addaction name="separator"/>
+   <addaction name="color_Grayscale"/>
+   <addaction name="color_Colormap"/>
+   <addaction name="color_RGB"/>
+   <addaction name="color_BGR"/>
+   <addaction name="separator"/>
    <addaction name="actionSelected_band"/>
   </widget>
   <widget class="QStatusBar" name="statusBar">
@@ -250,10 +256,10 @@
     <bool>true</bool>
    </property>
    <property name="text">
-       <string>(N*C*H*W)</string>
+    <string>(N*C*H*W)</string>
    </property>
-      <property name="shortcut">
-          <string>Ctrl+Z</string>
+   <property name="shortcut">
+    <string>Ctrl+Z</string>
    </property>
   </action>
   <action name="order_H_W_C">
@@ -261,16 +267,20 @@
     <bool>true</bool>
    </property>
    <property name="text">
-       <string>(N*H*W*C)</string>
+    <string>(N*H*W*C)</string>
    </property>
-      <property name="shortcut">
-          <string>Ctrl+X</string>
+   <property name="shortcut">
+    <string>Ctrl+X</string>
    </property>
   </action>
   <action name="color_Colormap">
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="icons.qrc">
+     <normaloff>:/artwork/icon-colormap.svg</normaloff>:/artwork/icon-colormap.svg</iconset>
+   </property>
    <property name="text">
     <string>Colormap</string>
    </property>
@@ -282,6 +292,10 @@
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="icons.qrc">
+     <normaloff>:/artwork/icon-rgb.svg</normaloff>:/artwork/icon-rgb.svg</iconset>
+   </property>
    <property name="text">
     <string>RGB</string>
    </property>
@@ -293,6 +307,10 @@
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="icons.qrc">
+     <normaloff>:/artwork/icon-bgr.svg</normaloff>:/artwork/icon-bgr.svg</iconset>
+   </property>
    <property name="text">
     <string>BGR</string>
    </property>
@@ -304,6 +322,10 @@
    <property name="checkable">
     <bool>true</bool>
    </property>
+   <property name="icon">
+    <iconset resource="icons.qrc">
+     <normaloff>:/artwork/icon-greyscale.svg</normaloff>:/artwork/icon-greyscale.svg</iconset>
+   </property>
    <property name="text">
     <string>Grayscale</string>
    </property>
@@ -311,39 +333,39 @@
     <string>Ctrl+1</string>
    </property>
   </action>
-     <action name="order_automatic">
-         <property name="checkable">
-             <bool>true</bool>
-         </property>
-         <property name="text">
-             <string>Automatic</string>
-         </property>
-         <property name="shortcut">
-             <string>Ctrl+A</string>
-         </property>
-     </action>
-     <action name="contrast_array">
-         <property name="checkable">
-             <bool>true</bool>
-         </property>
-         <property name="text">
-             <string>Complete array</string>
-         </property>
-         <property name="shortcut">
-             <string>Ctrl+,</string>
-         </property>
-     </action>
-     <action name="contrast_canvas">
-         <property name="checkable">
-             <bool>true</bool>
-         </property>
-         <property name="text">
-             <string>Over current canvas</string>
-         </property>
-         <property name="shortcut">
-             <string>Ctrl+.</string>
-         </property>
-     </action>
+  <action name="order_automatic">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Automatic</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+A</string>
+   </property>
+  </action>
+  <action name="contrast_array">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Complete array</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+,</string>
+   </property>
+  </action>
+  <action name="contrast_canvas">
+   <property name="checkable">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Over current canvas</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+.</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>

From b979511636bb5ee0695285c15dbf7f6d6e5e18d7 Mon Sep 17 00:00:00 2001
From: Roman Stoklasa <rstoki@seznam.cz>
Date: Wed, 15 Dec 2021 16:48:28 +0100
Subject: [PATCH 3/3] Added description of the Horizontal Scroll feature and
 scrolling through the slices.

---
 README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/README.md b/README.md
index 0582064..d849663 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,17 @@ Then, the appropriate array will be loaded and all features can then be used.
 ![npz](https://raw.githubusercontent.com/ArendJanKramer/Numpyviewer/master/artwork/Screenshot%20npz.png)
 
 
+
+## Scrolling through the slices -- "horizontal scroll"
+The numpy viewer supports fast and easy scrolling through slices using a Horizontal Scroll. This may be very useful to review 3D images, or to quickly scan through various examples in your batch or dataset. 
+
+For scrolling through the slices, you can either use your hardware `horizontal scroll` mouse wheel, or a combination of `Alt`+`scroll wheel` *(the standard one)*. 
+
+The default scrolling speed is 1 slice *"per step"*, in order to be able to reach any slice you want. However, this may be too slow and tedious if you want to find some particular slide far away from the begining -- and that's why there is also a "Fast mode". Just hold down the `Shift` key while you are scrolling and you will scroll 3x faster. 
+
+
+
+
 ## Contributes
 Three functions were kindly borrowed from K. Dijkstra's DDSL.