When I edit a RAW or PSD and have different layers, it happens regularly that I can no longer scale the image all of a sudden. The frame in the navigator is then the size of a web banner, regardless of whether I scale it to 5% or 2000%. The cursor changes to an arrow and no longer changes. I can click different tools to select them, but it doesn't switch. If I restart PS or reopen the picture it works again. I can't find the solution to unlock this type of lock again.