Issue

In CAD software such as ZWCAD or AutoCAD, after starting a command like COPY or SELECT, you may want to select objects by creating a selection window: click one corner, move the cursor, and then click the opposite corner.

Normally, a rectangle should appear to indicate the selection area. However, in some cases, the rectangle does not show up, and the window selection does not work.

Cause

This issue is usually caused by the settings of two system variables: PICKAUTO and PICKDRAG.

Solution

Follow these steps to fix it:

1.Type OP in the command line to open the Options dialog and click the Selection tab.

2.Check Support automatic windowing, and set Window selection method to Both – Automatic detection.

3. If you are using an older version, check Implied windowing in the Selection tab.