>When using these applications, I can copy files using F5 - and I know it is F5 without looking, because it is in the middle and has an empty space to the left. Similarly with F8 (delete) - in the right region, has space to the right.
Well, no such space on the physical keyboard I'm using now. Not after F5, and not after F8.
Not only debuggers, like others mentioned. But also some popular file managers (windows: Far, Total Commander; linux and osx: Midnight Commander).
When using these applications, I can copy files using F5 - and I know it is F5 without looking, because it is in the middle and has an empty space to the left. Similarly with F8 (delete) - in the right region, has space to the right.
With touch strip, you pretty much have to look away from the screen, onto the strip.