Not sure if it is about an international Keyboard or using a Mac or both, but the shortcut/keystrokes for a "Snapshot to Disk" (CTRL + ' ... or "CTRL and the key-right-from-the-L") don't work ... at least for me.

From the menu, the function works.

Fixing the use of the keyboard-shortcut would be nice.

Also putting the keystroke on something less difficult or misleading (eg. "qualifier key(s) + "S" or "D") would be great.

And adding an optional UI-button, you can choose from the optional buttons to put them into the buttons on the windows would be awesome (Firestorm have this option since long already ... the LL default-viewer and the close to it's UI looking Megaphahit haven't it).