Quick Mask is a tool in Photoshop that allows you to quickly create a mask of an object or area. To use Quick Mask, first select the object or area you want to mask. Then, click on the Quick Mask button (the three lines in the top-left corner of the Photoshop window). The Quick Mask dialog will appear. In this dialog, you can choose how to create the mask: by selecting one of Photoshop’s built-in masks, or by creating your own mask using a drawing tool such as Pencil or eraser. Once you’ve chosen how to create the mask, click on OK to create the mask.
