Has anyone else tried playing a windowed game of Zeus and Poseidon on a second screen? Whenever I drag the window to the right and into the extended desktop, the panning for the game gets stuck in that direction. I end up staring at the right edge of the map. I can kind of move slowly to the left if I hold the left arrow down, but as soon as I let go, the map pans back to the right edge.

I have the game installed on a 64-bit Windows 7 laptop. I have no problem playing the Zeus portion of the game on the main screen, but I would like to use the bigger display of the external screen.

Have you tried any compatibility options? The ones that are under the Settings group. If all else fails, there are utilities that help you control on what screen a particular program starts.

Try Windowed Mode with DXWnd
www.gog.com/forum/caesar_series/caesar_3_wont_launch/post5
www.reddit.com/r/impressionsgames/comments/5kwbzx/how_to_get_caesar_iii_to_run_in_windowed_mode_on/

Windowed mode via DXWnd allows you to bypass some rules:
- removes the window frame, which is so annoying for many in Windowed mode;
- you can drag the Game window to another monitor (the mouse will not stop working);
- bypass "noWindowed" bug in widescreen patches;
- bypass Color Rendering NOT 16bit for Windows7;
- (perhaps bypass Scaling is NOT 100% ;)