Products Web Updates Perform a column selection by by dragging By Umar Hansa Umar is a front-end web developer You can make a column selection in the Sources Panel editor by holding Alt while dragging the mouse. Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 3.0 License, and code samples are licensed under the Apache 2.0 License. For details, see our Site Policies. Java is a registered trademark of Oracle and/or its affiliates. Last updated February 28, 2017.