This dialog box allows selecting a zone on images where stamps will be placed.
When a TIFF or PDF file is chosen, currently defined zone is displayed over the image (only first successfully opened page of the file can be displayed). You can change its size or draw zone in another place of the image.
If the stamping area is too small in height to enclose the minimum acceptable part of a stamp (in current version, this value is 50% of stamp height), it causes an error message "Stamping area is too small".
If the stamping area is too small in width even to enclose one symbol of the stamp, it causes an error message "Stamping area is too narrow".