I think I know what you are referencing to. You mean that when you pan the map with the mouse by dragging, the parts of the map ,that were not within the original extent of the map, are blank. So, you have the effect of having white corners of the map while panning around. This is normal behavior within Map Suite Desktop 2.0. In the current version 3.0, we made the improvement with Progressive Panning. This means that as you pan, the areas of the map that were not within the original extent get filled in progressively. This is a feature most of us are familiar as Google Map does that and this feature will be available in both Desktop and Web edition of Map Suite 3.0 around mid january. So, if you want that feature you should migrate to 3.0. I hope I understood your request.