Take your actor to Composer Mode.
Select the bone and it will turn blue with a Blue box around it.
Use the handles on the box to size and rotate the bone.
Note that the sprites attached to that bone will size/move/rotate with it.
To align/size/rotate sprites to the bone use the sprite editor.
Select the bone and open the sprite editor and a Green box will appear around the sprite selected.
Adjusting the handles affects ONLY the sprite shown.
If you have multiple sprites for that bone you must adjust each one separately.
If you have multiple angles for that bone you must adjust the sprite(s) for each angle separately.
See my CTA Tutorials on the YouTube channel CTAStepByStep
Check out EZColors for CTA. The easy way to change Render Styled (RS) colors.