Actions are a powerful feature in Photoshop which can save you time by performing repetitive tasks for you automatically, and for batch processing multiple images when you need to apply the same set of steps to many images.
In this tutorial, I will show you how to record a simple action for resizing a set of images and then I'll show you how to use it with the batch automate command for processing multiple images. Although we'll be creating a simple action in this tutorial, once you know the process, you can create actions as complex as you like.
This tutorial was written using Photoshop CS3. If you have an older versions of Photoshop, see my earlier tutorial for creating actions and batch processing in Photoshop.
To record an action, you'll need to use the actions palette. If the actions palette is not visible on your screen, open it by going to Window -> Actions.
Notice the menu arrow at the top right of the actions palette. This arrow brings up the actions menu shown here.