convient reset to unprocessed mode with the currently selected preview.
Use the Preview > Undo/Redo Preview command (Ctrl+Shift+Z). This option is also available as a tool bar button (look for a button whose icon is like the normal undo/redo arrow, but emerging from a small green square).
Alternatively, when you have stored more than one process in a preview, you can traverse its processing history as I explained in the previous post (right-click and select Load History Explorer, or select the preview on the History Explorer window directly).
Bear in mind that other than the fact that a preview is a temporary object by nature (because it is always stored in RAM), it behaves just as any image in PixInsight.
