Resizing Windows
Emacs windows may be resized by dragging their window separators (modelines or vertical side lines) within a frame. Simply depress either Smart Mouse Key on a non-bottommost modeline or near a window side, hold it down while you drag to a new location and then release. The window separator will move to the location of release. Basically, just drag the window separator to where you want it. Drags from a blank area of a modeline show visible feedback as the window is resized.