Question: how to open two microsoft project 2010 windows?
Answer: However; it is not possible to have two sessions of Microsoft Project running at the same time. In Microsoft Project (2010, 2013) it is not possible to do this. So if you need to open two schedules side by side the only way to achieve this is to use the 'Arrange All' button in the 'Window' section of the 'View' Ribbon.