Cubik Studio

I'm still confused by the forum's keyboard shortcuts tutorial. Currently, I'd like to know if there is a keyboard shortcut for adjusting by 0.1 grid.

If even basic functions are difficult to perform, and there's no one to provide guidance or answer questions, then this software is not very user-friendly.

The developers might have abandoned this program a long time ago...

View menu > Grid Settings > Set Keyboard snap to 160

That will allow you to nudge elements by 0.1.

The numbers may look odd, but they are relative to the concept that everything in Minecraft is 16 pixels big (so if you set the number to 16 it'd nudge elements by 1).