If you're using different computers to edit one project, you'll be shocked how bad is decision to keep mixer size a property of each project. I.e. my workflow:
1. open my song on computer A. re-size the mixer. do stuff
2. open on computer B. re-size the mixer. do stuff
3. open on computer A and still have to resize the mixer
Typically engineers have one preferred mixer size and position for their display and likings, this should be set once and applied to all projects on one computer. But keeping different mixer size as a project properties does not really make sense.
