First time I've tried using this tool (That's my excuse):
I used the tool to rotate the image, as desired, but saw no "Commit" / confirm command, as with the Crop Tool.
I wished to crop the image after applying Rotate View Tool, but when I select the Crop Tool, the image rotates back to it's original position???
The rotate view tool is strictly for changing the viewing angle, so that you can paint or use other tools without awkward hand motions. It's set to return to normal. If you want to rotate and crop, use the crop tool.