Hello,
Wondering if I am able to create a vertical video pin in 2:3 ratio size such as 600x900 for Pinterest? Looking to have a video up top and a photo underneath (or vice versa) I can do this in Premiere Pro but not sure if I can with KDE. Thank you. ~Angela

Yes, this souls be possibe. Goto project -> project setting -> click the icon "manage project profile" -> click the icon "create new profile. Make the settings as desired.