How to scale skin modifier I'm currently learning how to sculpt in Blender, and my course instructor has had me make a skin modifier basemesh. Unfortunately, he told me to use the shortcut "ctrl-a" to scale up the thickness of certain vertices/edges of my basemesh—an operation I cannot complete because I assigned (edit mode) ctrl+a to do a different operation.

Is there another way to complete this operation, and if not, how do I get my hotkey back to the default?
Another way to complete operation: hit the Space bar, start typing "skin resize"

Change your hotkey: in the User Preferences window, in the "Input" section, you can search for "skin resize" when searching by Name, that will let you assign a new (or old) keyboard shortcut for that operation.

To find what you've got assigned to Ctrl-A, search by Key Binding and type "Ctrl A", that will show everything that's bound to that combination.