Final answer:
The Clone Stamp tool allows users to copy and paint with previous pixel data and is effective for fixing painting errors in digital image editing software like Adobe Photoshop.
Step-by-step explanation:
The tool that makes a copy of previous pixel data and lets you paint with that data, particularly useful for undoing painting errors, is known as the Clone Stamp tool. When using this tool, you first select a source point in the image that you want to clone (or copy) from. Then, by painting over another area of the image, you apply the cloned pixels onto the new location. This tool is widely used in digital imaging software such as Adobe Photoshop. It's especially helpful for retouching images, repairing damages, or duplicating elements within a picture.