The 'properties' say it's 16:9,
the projectsettings say it's 4:3.


When I proceed it becomes 16:9.
I don't understand!!
Any help?


Your project settings will determine what aspect ratio is used for anything and everything that MF will render, including menus and clips.It's not very transparant
What is the meaning of "last choice"? Why can't I change the aspect ratio of the current project?Your project settings will determine what aspect ratio is used for anything and everything that MF will render, including menus and clips.
You choose the project settings. The last choice (16:9 or 4:3) is the default next time you start a new project.