I often use external Viewers (for PDF in example 'cause they are faster, more features etc.) but i like to close them with MY Shortcut eg. with the [ESC]-Key instead of ALT+F4 (cause it's much faster).
This is not always possible 'cause there are much Applications where you can't define Keyboard-Shotcut's.
Could you please implement such a Feature.
--> Close External Viewer by a defined ([ESC]) Key ?
