Selecting Objects Using Selection Windows in AutoCAD

You can select objects by enclosing them in a selection window. A selection window is a rectangular area that you define in the drawing area by specifying two corner points at the Select Objects prompt. The order in which you specify the points makes a difference. Dragging from left to right (window selection) selects only objects entirely within the selection area. Dragging from right to left (crossing selection) selects objects within and objects crossing the selection area. Objects must be at least partially visible to be selected.

In general, you must include the entire object within the selection window to select it. However, you can include objects with noncontinuous linetypes by including any complete, visible portion of the linetype within the selection window. For example, if a line has a dashed linetype, you can select the entire line by including one or more complete dashes within the selection window.

If the PICKDRAG system variable is on, you can hold down the pick button while you create the rectangular selection area. If PICKDRAG is off, specify the area’s corners individually. PICKDRAG is off by default.

To select objects within an irregularly shaped area, enclose them in a polygon selection window. A window polygon selects only objects it encloses entirely, and a crossing polygon selects objects it encloses or crosses. Create the window by specifying points to enclose the area. The order in which you specify points defines a window or a crossing polygon.
In the following example, you use a window polygon to select all the bricks entirely within an irregularly shaped area.

To select objects within an irregularly shaped area

  1. At the Select Objects prompt, enter cp (Crossing Polygon).
  2. Specify points from left to right to define an area that entirely encloses the lines you want to select.
  3. Press ENTER to close the polygon and complete the selection.

The following illustration shows the result of specifying the same selection area as a crossing polygon.

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