What you want IINA to do:

I love Iina, and if I weren't already a Mac user, I'd switch to Mac just to use it. Coming from VLC, which although a dinosaur today has fabulous customization options for every facet of the UI, I realized there is no on-screen way to take a screenshot (which I do often for my work).

(Usually I use a mouse with extra buttons and have set this up for myself, but I am temporarily using a different mouse which made me realize the lack of these features.

What IINA does currently:

I notice that I can add many items to the On Screen Controller like Quick Settings, Playlist, Toggle Picture in Picture. But a screenshot option is not available.)

(I was also going to point out that Forward/Rewind are also not available as on-screen buttons, but I see the option to use << >> for this purpose instead of

Why you think this should be added:

Certainly a visual way to take screenshots would useful as a selectable option. It could also be needed for some users who only have a mouse to manipulate a computer.

Examples of other projects that have something similar:

VNC. It allowed us to have as many or as few icons in the on screen controller (both of them) so we could keep things simple or make them more complex.