A Beginner's Guide to Resizing Mac Windows (

macmost.com/e-... You can resize a window in the Finder and almost any app by clicking and dragging on the edges or corners of a window. You can use the Option key to drag opposite sides or all sides at once. The sides of a window will stop at the edges of the screen. You can also double-click a corner or edge to move that side to the edge of the screen or fill the entire screen without going into full screen mode.