Show an indicator that a split is zoomed in

[zx8]

When I'm zoomed in to a split and e.g. have multiple other tabs open, it's easy to forget that I zoomed in to a split in one tab.

Would it be possible to add an indicator that a split is zoomed in, similar to the Secure Keyboard Entry icon?

For reference, iTerm uses the following indicator:

[gpanders]

There is an icon when a split is "zoomed". If there are no tabs, the icon is in the title bar:

If there is a tab, then the icon is in the tab itself:

[zx8]

That's strange, I can see the icon when I have multiple tabs open, but I can't see it when I have no tabs open.

It seems to be related to the following setting:

macos-titlebar-style = tabs

When I comment it out, I can see the icon you're referring to.

[mitchellh]

Yeah this feature only applies to native tabs currently.