Any labeled diagram where the labels are the point: anatomy plates, histology slides, biochemistry pathways, circuit diagrams, geography maps. You mask each label and Anki asks you to recall it, one region at a time, instead of staring at the whole figure. Open the image occlusion editor, drag in a diagram, or pull an image straight from a Notion page. Screenshots, textbook figures, and photos of a printed diagram all work. Draw over each label with the rectangle, ellipse, or polygon tool — polygon handles irregular shapes like an organ outline. Hide and show the masks as you work to check your coverage, and undo or duplicate a mask to move fast across a busy figure. 2anki turns each masked region into its own card and packages the deck as a .apkg file. Open it in Anki with a double-click. Every masked region becomes a separate prompt, so one diagram can produce a dozen cards in a couple of minutes. Diagram-heavy subjects are faster to review as occlusion cards than as text. Build them alongside your text cards from lecture slides and notes so one deck covers both the facts and the figures.