I just tried the Win, Shift and arrow-keys combo in E16 and ...... They don't work indeed ...... they only maximize.
So that only leaves "mouse" options to resize........yes mouse or touch-pad.
- as a first the Ctrl, Alt middle-click method.
Else:
- Ctrl, Alt and right-click on the top bar to get window options.
- or click the little blue rectangle top left in the window bar for the same options.
- or access the lower right corner of the window to drag and resize (it gets translucent)
Where if the window will not resize to a certain height or width, find "toggle max height/width" option from 1. or 2. above.