9-slice fundamentals

Four insets divide an image into corners, edges, and a center. Corners retain their detail while other regions stretch or repeat. Keep decorative detail inside the protected borders.

Open an image in Slice Studio. Set top, right, bottom, and left insets with guides or numeric controls, then preview wider and taller sizes. Automatic detection is a starting point; check its cuts against the artwork.

Use a nine-slice placement to resize with slice settings. Compose offers placement-specific inset controls. An ordinary image placement scales the whole bitmap, so check the layer type when corners stretch.