Masking in Photoshop is technique that allows you to hide imagery within your layers. It’s very non-destructive, as you’re not erasing these pieces forever.
We create masks by clicking “Add layer mask”. We can either make a selection based on the original image, use a pen tool for selection or use the brush tool within the mask layer to hide elements.
Different masks include:
Layer Mask — is something that you apply to a given layer to control the transparency of that layer.
Clipping Mask — similar to layer masks only they use one layer to determine the transparency of another.
Vector Mask — hard-edged mask defined by shapes created by a vector path on a layer
Gradient Mask — use the Gradient Tool on a Pixel Mask to create soft transitions between your masked image and other layers below it.
Pixel Mask — with Custom Brushes and special Brush Tip Shapes on your mask
Quick Mask — a preliminary stage of creating a mask. It can be turned on by pressing Q and once inside Quick Mask view you can use the Brush or the Gradient Tool to create selections.