BBB and BB-View 4.3" LCD

I have installed and have working a 4.3" BB-View LCD on my Angstrom Beaglebone black, however I am unable to resize application windows to fit size of LCD.

Dragging window frame only marginally changes the window size and maxmizing the window doesn’t help either - window stays much larger than LCD.

Looking for suggestions as it’s pretty unusable in its current state.