I'm running Spriter on Linux (Arch 64 bit) via Steam and I've hit the problem with using the Alt key with left click to create bones. I noticed that there's a thread on the Steam discussions from 2016 saying this would hopefully be fixed in the next build. I'm therefore assuming there's an option somewhere to tweak the shortcuts, but I can't find it anywhere - Settings only has AutoSave options and nothing else...
Also, assuming it is possible, does anyone have any recommendations for a good shortcuts combination that doesn't clash with existing shortcuts?