If you’ve ever tried to expand the size of a selection in Photoshop, you’ve no doubt come across a nasty result. Using the Expand Selection menu item results in the corners of a rectangular selection being rounded off. It’s quite frustrating. Creativetechs has the solution. Rather than choosing Select>Modify>Expand from the menu, choose Select>Transform Selection instead. Doing so will result in Photoshop’s normal transform box appearing around your selection. Now you can drag a corner to resize, or enter new values in the Options Bar to give you a new selection area with the squared-off corners you expect.
They’re really not the same thing, though; you get the squared-off corners, but you don’t get an extension of the selected object’s edges.