OK, this has irritated me a long time. When I adjust image position by dragging or nudging it (select all, nudge with keys), there appear transparent area where the image was moved away, So far so good. But when I save TIFF it stays there and does not flatten like nice wellbehaved TIFF should (unless told to have layers). Even worse, there seem to be no way in Acorn to remove this transparency.
In Photoshop 1) there is no transparency in TIF (unless set in save options) and 2) Flatten image command would remove transparency. In Acorn Flatten command seems just to flatten layers but it ignores transparency.
Is it really only way to remove transparency to add white layer behind actual image and flatten that? That slows editing as there may be hundreds of images and workflow should be as quick as possible. And this transparency shows as artifacts down the road when I process further in other batch apps.