[csdvrx]

No. My function keys are used for things I do more often, like change color profiles, toggle a single app into dark mode, etc.

My favorite trick is not the function keys but other "useless" keys: like Caps is remapped to be Esc (when released before another key is pressed) or Control (when used in conjunction with another key: act as a modifier), my 2 shifts and 2 alt do their normal modifier function (when used in conjunction with another key) but when used by themselves act as PageUp/PageDown Home/End

Going up 2 pages up in the browser? Shift Shift. Top of the page? Alt. Bottom? The other Alt.

For the Control keys, as I don't need that many I've experimented with a few remapping, but BackSpace/Delete are very handy.

Going to the previous page in the browser? Alt+Control.