How to create Photoshop Actions?
Window > Actions
Now open a photo so we could record an action that we'll apply to a batch of photos later (this can help you save lots of time).
I usually do this after conventions.
I'll be using Nikki and Ken's photo... don't kill me Nikki!! /hides
Create a new Action Set.
After creating a New Action Set, create a new action, after this step; your actions will start recording.
Note: Don't forget to stop the recording.
File > Automate > Batch
Ahhh sorry making this tutorial short, just leave a comment if you have question/s ^^