Changing aspect ratio/canvas size

hi, i came to this forum and learned how to change the aspect ratio of my canvas size FROM widescreen (1920x1080) to vertical (1080x1920) — and now I cant get it to change back! lol

Can someone help?

Hi !
You can change the resolution values in Canvas/Main Output Controls Rez:, the open window in your screen capture, just type the numbers there

Where is says Rez: 1080 x 1920, you can change that value to 1920 x 1080 for the main canvas and it will adjust it. Or if you set that in your VDMX > Preferences, you can change the default there too.