In order to change the resolution of the pages in Vijeo Citect project do following things:
1. Add the following INI parameter through Computer Setup Editor
a) [Page] MaintainAspectRatio = 0
2. Use the Cicode function 'WinSize(Width, Height)'
If the configured resolution is 1024x768 of the project pages and needs to be changed to 1280x1024, you need to run said Cicode function WinSize(1280, 1024) as the 'Startup Cicode Function' along with suggested INI parameter settings.