Toolbar
Select or moved.
Cursor
Change the location of the 2D Cursor.
Move
Rotate
Rotation tool.
Scale
Scale tool.
Transform
Tool to adjust the UVs translation, rotations and scale.
Draw free-hand annotation.
The Rip tool separates UV faces from each other.
The Grab tool moves UVs around.
The Relax tool makes UVs more evenly distributed.