How can I change the image format in the output

[d1w3ro]

how can I change the size of this black window in the back so that there are no black bars on the sides when I output it, and it has the format of a phone instead of a monitor?

 

[Mikheil]

how can I change the size of this black window in the back so that there are no black bars on the sides when I output it, and it has the format of a phone instead of a monitor?

Hi, you can't do it directly, you have to try with the plugin Aitum Vertical

 

[BookerWillie]

Set canvas and output resolution to 720×1280 in settings then fit your source to screen.