So the 'Screenshot' hotkey has always been assigned to "Scroll Lock" or "SCRLK", Not all keyboards and/or laptops have this key, so I think it would be a nice QoL change (if its possible) to make it possible to move the hotkey and attach it to any desired key rather than having to use "Alt + PrtSc" or resort using programs like Snipping Tool which would be fine for some people but the issue with Snipping Tool and "Alt + PrtSc" is the screenshot size, you'd usually have to convert it to JPEG in order for the image size to reduce and be usable in the forum for example which has a limit of 1MB. So I think it would be a nice convenient change for everyone.
You could probably just bind scroll lock to another button in windows still agree that it would be better if you could just change the key in maple though. However the size of the image saved is still larger than 1mb so you would have to upload it to another site or compromise the quality by saving it to a jpg.
If there is no client limitation that prohibits unlocking the screenshot button, I'd like this feature as well. I know some laptops have a key combo where you press FN + certain key and that acts as a scroll lock, but I think it doesn't work in Maplestory. Atleast not for me. I have 3 keyboards and none of them have scroll lock key, sad life.