There are two types of window selections methods that you can use while selecting objects in the drawing.  To start any window selection, you must first pick a space in the drawing.  If you select an entity, instead of an empty area in the drawing, the entity will be selected, and the window selection will not start.

Window

A window selection will select all objects entirely inside the rectangle, defined by two points.  Specifying the corners from left to right creates a window selection.  A window selection will have a solid border for the rectangle.

1. Only the entity entirely inside the window selection will be selected.
   

Crossing

A crossing window selection will select all the objects that are within any part of the window.  Specifying the corners from right to left creates a crossing selection.  The crossing window will have a dashed border for the rectangle.

1. All Entities that touch a crossing selection window will be selected.