It’s so easy, all it takes is one Layer with the -slideshow hint appended to it.
First create a new Photoshop document to contain the slideshow placeholder Layer. In my case my document will be the actual size of my slideshow (366×375, White Background).
In the new document:
- Set Foreground Swatch to a color of your choice. It doesn’t matter which color – I used Black. Then select the Rectangle Shape Tool from the Toolbar.
- Enable Fill Pixels on the Options Bar for the active Rectangle Shape Tool
- Then Draw in your shape as I have captured below. The append the -slideshow hint to that Layers cation/title in the Layers Panel.
Then go File > Automate > SiteGrinder2 to launch the plugin module.
At the plugin module:
- Click the SlideShow tab
Then click the target Source folder area (encircled in red)