This command saves the current position, or modifies the relating information, without going through the "Save as" dialog box. The number in the "Save a position" dialog box editing zone initially shows the current position's location in the file. Changing this figure will over-write an existing position or copy the position at the end of the file.
If the current file or the relating information are modified in any way, a dialog box will ask you to confirm the changes when you switch to another position.
This command is not available when the current file is missing.