Use the 3D Object Rotate tool in the left-hand toolbar to rotate an object in 3D. Select the element, then drag the element to freely rotate it.
To constrain the rotation to 45° increments: Hold the Shift key while dragging.
To rotate an object along a single axis: Drag one of the colored rotation rings. For example, dragging the red ring rotates the object around the global x-axis.
To change the rotation pivot point: Drag the center ring to a new location.
To reset an object to its original rotation: Open the Properties panel. Under Translation, rotation, and scale, select Absolute and set the rotation X, Y, and Z values (the second row) to 0.
Local and global rotation
In local rotation mode, the 3D rotation rings align with the object so they appear to skew as the object rotates. In global rotation mode, the 3D rotation rings stay aligned with the stage.
To choose your rotation mode: Select Rotate locally or Rotate globally
in the tool options bar at the top.
To temporarily switch to global rotation mode: Press Alt (Windows) or Option (Mac).
Delta and absolute values
You can change an object's rotation using absolute or delta values. Delta values are in relation to the object's current rotation, while absolute values are in relation to the stage.
Example
An object is currently rotated 30° on the x-axis. If you want to change the object's rotation to 45°, you can edit the absolute value of the X rotation to 45°. To use delta values instead, enter the difference, 15°, which gives you the same result.
If Delta is selected, all the Translation, rotation, and scale properties display as 0. When you enter a new delta value, the object rotates that amount, then the value resets to zero. If you make more changes, they're applied to the object's new rotation.
You can switch between delta and absolute values at any time.