Request: Keyboard navigation

[-g-]

I love the thumbnail navigation to move around an image bigger than the XnView window, but what about a keyboard alternative to do the same thing.

Currently, as of 0.38.7, both PgUp/PgDwn and Left/Right are used to move between images, leaving Up/Down with apparently no function in the Image tabs. How about leaving PgUp/PgDwn for moving between images and make the arrow keys the option for moving within images bigger than the window?.