You can try to set the Zoom to 100% (press the
non-numeric-pad keyboard button
2), then press the numeric-pad keyboard button
5 (to reset the Pan&Scan settings) and finally set the Pan&Scan to 50% (
SHIFT+O then move the slide until you reach 50% of its run)
There are no settings to set Zoom to 150% (at least there aren't if you want Zoom at 150% in Normal, not fullscreen, mode)
Finally you have to select the option
Remember Pan-Scan settings in BSplayer Preferences (CTRL+P -> Video)
