How do you rotate your alpha brush in sculpting mode? I have my standard brush loaded with a texture (alpha image), and I'm wondering if it's possible to rotate the alpha on the fly or otherwise, preferably with drag dot as the stroke.
In case you're referring to the stencil image in the 3D view, Then you can achieve that by pressing Ctrl + Right click.
Additionally, you can move the stencil image using Right click, you can scale it using Shift + Right click.