In Photoshop, there is a specific shortcut for adding a hidden layer mask, also known as a "Hide All" layer mask. This is particularly useful when you want to start with your entire layer content hidden and selectively reveal parts of it using a white brush.
Based on the provided reference, the shortcut to add a layer mask that hides everything (fills the mask with black) is:
- For Windows: Alt + click on the Layer Mask button at the bottom of the Layers Window.
- For macOS: Option + click on the Layer Mask button at the bottom of the Layers Window.
Using the Shortcut for a Hidden Layer Mask
Adding a hidden layer mask is a common workflow, allowing precise control over visibility. The shortcut leverages the standard Layer Mask button found at the bottom of the Layers panel.
Here's how to apply the shortcut:
- Select the layer you wish to add the mask to in the Layers panel.
- Hold down the Alt key (Windows) or Option key (macOS).
- While holding the key, click the Layer Mask button. This button looks like a rectangle with a circle inside.
This action will instantly add a layer mask to your selected layer, and the mask thumbnail will appear black, indicating that the entire layer is hidden by default. You can then use a white brush to paint on the mask and reveal parts of the layer.
Understanding this shortcut allows for efficient masking workflows, especially when you intend to hide the majority of a layer's content from the start.
