There is a shortcut for all the functions on the user interface (even for about page). I believe that there should be a shortcut for Scan aswell.
Created attachment 103785 [details] Skanlite buttons
You are correct that Scan should have a default short-cut. When I run Skanlite I do get an auto-generated "Alt-.." shortcut, but it seems that with your translation/locale somehow, the Scan button is left without :( I think the correct solution to this is to add an action "Ctrl-s" to Scan and Ctrl-p to preview.
I agree with the solution you suggested. By the way, in my system, the Alt-S is associated with Settings.
Made some study on this: `Scan` has no shortcut, because S is mapped to Settings, C is Close, A is About, and N is Contrast when a contrast option is present. This explains why when you pass `-d test` to it, N is mapped to Scan: there is no such option. My proposal is to manually assign T to Settings. Am preparing a patch.
Preview now has the shortcut Ctrl-P and scan has Ctrl-S. There are also tool-tips showing the shortcut. The automatically assigned Alt-... shortcuts are language dependent, so it is a bit unstable... I think the Ctrl-... ones should be good enough :)
Hmm, Ctrl+S is typically "Save". Given that Skanlite already has a "Save" function, these shortcuts would overlap.