Tipworld -> Photoshop
Toggling Transparency

In our previous tip, we discussed how to use the Preserve Transparency option to confine your modifications to the object on a layer. Much like selecting an area of an image, Preserve Transparency preserves the transparent area around the existing objects on a layer.

This is a great feature, but it can get in the way when you want to add pixels to a layer. Fortunately, you can quickly toggle Preserve Transparency on and off with a keyboard shortcut. In Windows or on the Macintosh, press / to turn Preserve Transparency on or off.