There’s a couple of possibilities here: either the 4 and 6 keys, or the Ctrl + shortcuts for basic 15 degrees rotation left and right.
Unlike SAI, these are tied to keyboard keys. Krita, just like SAI, allows you to flip, rotate and duplicate the view. This section goes over the functionalities that Krita and Paint Tool SAI share, but shows how they slightly differ. Introduction to Krita coming from Paint Tool SAI ¶ How do you do that in Krita? ¶
