I am searching for a solution to change between these 2 file formats quickly (best: changing it via a shortcut e.g. via AutoHotkey...) and afterwards making a screenshot via the "usual way" = (in my case) by pressing the print screen key and then by choosing an option of the post capture menu (by the way: I added some more shortcuts for this menu with AutoHotKey, e.g. for uploading an image directly to www.abload.de
and similar specific needs)...
... and not doing this "circuitous" by right clicking on the icon in the system tray - preferences - choosing the file format - clicking Accept
... because I change this setting very often a day and want to do this "very quickly"
PS: sorry, my German is much better than my English