I don't have any problem in 800x600 howewer the dialog
are resized based on your font size setting it can be your problem.
Notice I tried with BIG font on XP and I still can read all the dialog even the bottom is a bit on the tray bar.
Another problem could be that your monitor is so badly set that half your image
show in the dark band on the side and top of the monitor, your image is partly "off screen".
Try to modify the setting on your monitor you should have button for that on it
(downzise a bit horizontal and vertical) and see if the rest of the image appear.
I would say try at first your monitors setting.
Dan