1080 and 720 in same project
As a very new starter, I've been trying to create a project using footage from both 1080 and 720 sources. If I select 1080 when starting the project, the 720 footage appears too small, and if I select 720 at the start, the 1080 stuff doesn't fit into the viewing frame. If possible, I'd rather not have a film which jumps between filled frame and footage floating somewhere in the middle of the screen with a black border around it.
I imagine there's a very simple explanation, but I haven't come across it yet, so I thought I'd ask. Thanks in advance for any help offered.