PaintPhoto

In my Panorama I need to align several areas. I have watched the Tricky Panoramas video which uses the "Add to Source Image Mask Tool" I looked through the Customized tool panel and cannot find any tool with this name. Please advise.

I am not sure where to point this but need help. In-painting stopped half way through. Could not reverse. Screen is frozen. Escape key does not do anything. Affinity will not shut down. Document will not close. Computer will not shut down because Affinity is running. Please help.

Please help. Inpainting stopped midway and screen froze. Escape key does nothing. Cannot reverse inpaint, Affinity will not close and computer will not shut down because of Affinity. Please advise.