dim inactive split pane + focused / active pane should have a more prominent color scheme or indicator

[elviskahoro]

Describe the solution you'd like?

ability to dim inactive split pane
+ add other passive visual indicator of which pane is in focus

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

UIUX

Additional context

Discord 10/18/2021 - feature requests
https://discord.com/channels/851854972600451112/852249738002956311/899669075268079616

[elviskahoro]

from @ianterrell via #700

Describe the solution you'd like?

I use a multi-pane workflow daily, usually 3-5 or so panes. When I navigate into or out of my terminal application I want to quickly identify which pane has focus. Warp's primary indicator of pane focus is a small triangle in the upper left corner, which is entirely too subtle. The command input area being expanded is also not quickly visually discernible in several panes.

Contrast with iTerm, which uses colors to distinguish the focus.

Screen.Recording.2022-01-28.at.12.53.24.PM.mov

[elviskahoro]

From @Integralist via #911

Discord username (optional)

integralist

Describe the solution you'd like?

Instead of the small arrow in the top-left corner of the currently active pane I would prefer for the pane's complete border (e.g. left/top/right/bottom) to be highlighted.

Refer to the attached image for a rough illustration of the solution.

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

I often have multiple split tmux panes open and currently it's very difficult to remember which pane I'm in.

I don't find the arrow design (currently used) to be a good indicator of that (it's too subtle, and this can be made worse by the user's chosen theme) and so I have to look extra hard, rather than being able to know quickly 'at a glance' where I am.

In tmux I don't have this problem because tmux highlights the border.

Additional context

Because this isn't going to be to everyone's preference, maybe allow this to be configured on/off and if it's turned off the user gets the current behaviour, which is a small triangle in the top-left corner of the active pane.