Backup your texstudio.ini so you can revert if you do something wrong.
Replace the texstudio.ini at the following paths depending on your OS.
Linux/Unix/Mac: ~/.config/texstudio/texstudio.ini
Windows: %APPDATA%\texstudio\texstudio.ini
This will overwrite all your texstudio configurations, so method two is preferred.
Open the texstudio.ini, look for the [Texmaker] tag and append the content of Macros.txt below.
Create Chapter: ALT + 1
Create Section: ALT + 2
Create Subsection: ALT + 3
Create Paragraph: ALT + 4
Create Enumeration: ALT + E
Create Itemize: ALT + Q
Create Subitem: ALT + CTRL + I
Create a Figure Environment: CTRL + SHIFT + P
Create a List Set Environment: CTRL + ALT + L
Create Glossary: ALT + G
Create Label: CTRL + SHIFT + X
Create Label for section: CTRL + ALT + SHIFT + L, CTRL + SHIFT + Y
Emphasize: ALT + V