The VideoLAN Forums

I can't decrease scale factor using VLC 1.1.9. I've tried Alt+Shift+ o and Alt+o and nothing works. My OS is Windows 7 Ultimate x64. I hope somebody will help.

If you mean zoom factor, it is in Tools -> Preferences (Show settings: All) Video (bottom part), then press Save and restart VLC.

I mean changing frame size in full screen mode. It's possible in Media Player Classic (there it's called PnS Dec Size and PnS Inc Size) using numpad 1 and 9.

There aren't hotkeys like that in VLC.