Time to update an old post today, on mouse clicks and selection windows.
In AutoCAD LT 2012, the PICKDRAG system variable has a new default option – 2. (Previously available were 0 and 1.)
The new setting means that you can start a selection window either by clicking once and letting go, then clicking again somewhere else and letting go; or by pressing and holding the left mouse button, moving the mouse, then letting the button go.
In older versions of AutoCAD LT, you had to choose which method you want to use, but now they’re both available all the time.
If you still use the two-click method, you’ll also notice that Fence, Window Polygon, and Crossing Polygon are now available even when you’re not inside a command. (Before, you had to have a command active to see those options.)