Seeing the before/after views can be a big help, either when you’re making your edits, or when you are illustrating the effect of the changes made. This quick tip – for Photoshop and Photopea users, will show you how to create a split screen effect with the minimum of effort. In a subsequent post we will take this further and develop an Action as well.
- To work non-destructively duplicate the Background Layer and switch it off.
- Using the Rectangle Select, split the image into 2 halves.
- Launch an Adjustment Layer, in the example I used the Black & White and the layer will be masked automatically.
- Launch another Adjustment Layer, eg: ‘Curves 1’ select the B&W layer mask.
- Press and hold the Alt key, drag it over the ‘Curves 1’ layer. Step 5 is unnecessary in Photopea.
- Answer ‘Yes’ to the Replace Layer Mask Question.
- Repeat from 4 to 6 to add additional Adjustment Layers.
The following images show the effect of the adjustments and that the original image section is unaffected.