Prime userkeys with embedded escape characters?

[Didier Lachieze]

(02-11-2021 01:17 PM)Wes Loewer Wrote:  You still have to press Enter afterwards to push the result onto the stack, but it's a step in the right direction.

Yes but you don't always need to, for example if you want to calculate 2*ASIN2(PI/4) you can just type in User mode:
PI 4 / Shift SIN 2 *

Also one of the limitations is that this user key assignment is applying the ASIN2 function to the value in the stack level 1, so if you want to calculate ASIN(0.5) you need to press ENTER after typing 0.5 to put it on the stack.
So not a perfect solution... but the best I was able to find.