Skipping sublabel indexing

[LecrisUT]

Is your feature request related to a problem? Please describe.

Let's say I have a grid of 1x3 plots that use. Now I want to add some custom legend like a colorbar spanning the full layout for which I would construct a layout of layout, but alas I couldn't find how to do that. In this limited case I can just add it as the first overlay, but then it gets the additional sublabel. Ideally there would be a mechanism to skip the labeling of a specific overlay that is used in +=

Describe the solution you'd like

Have a .opts() option like sublabel_label or sublabel_skip that would overwrite the generation through sublabel_format.

Describe alternatives you've considered

Maybe this would be possible by composing with the primitives behind holoview.Layout, but how to use those is undocumented. The closest alternative is the panel.Column/panel.Row, but it is unclear how things like renedere.save() interact with those.

Additional context

[ahuang11]

Related to holoviz/hvplot#1370

from holoviews.core.options import Options

options = hv.Store.options(backend='matplotlib')
options.Layout = Options('plot', sublabel_format=None)

[LecrisUT]

Yes, but in this case it's about making it selectively skip labels, i.e. b) should become a) in the screenshot. Strongly related to this discourse comment though