I’m currently thinking how to map the F77 layout to my needs and I think I will be needing some tactile cues for 4 (F4) and 8 (F8). I use the functional keys during code debugging sessions and feeling the keys, just like I can feel the gaps between the functional keys in my current keyboard’s layout would be extremely beneficial.

Are there any key caps with different rugosity or with tactile bumps in the middle/upper area of the key?

Many thanks!