A blank layer doesn't contain any mathematics or pixels.
It has a checkerboard pattern.
You can use it for retouching, such as using the Clone Stamp tool.
There are three ways you can create a blank layer.
To create a blank layer, click the Create a blank layer icon.
The icon is located at the bottom of the Layers panel.
It's located at the bottom of the Layers panel.
You can also go to the Layer menu at the top of your screen.
Go to Layer > New > Layer.
Press Shift + Ctrl + n.