Destructive Editing

Question 1

Making adjustments using the image > Adjustments menu

Answer 1

Unlike the Adjustments Panel, adjustments made through the Image > Adjustments menu are considered destructive because they don’t apply an adjustment layer automatically.

Question 2

Using the Clone Stamp tool

Answer 2

Using the Clone Stamp tool can be done non-destructively only if you create a separate adjustment layer first. Using the Clone Stamp tool directly on the original image does alter the image data.