Add Selection Fill is a solid-style Icon from Outlined Fill - Streamline Material set.

The Add Selection Fill icon shows a dotted selection rectangle with a plus-shaped cursor overlapping its lower-right edge. Drawn in the solid style on a 24px grid so its filled geometry stays clear at small sizes. Use it for selection tools, image editors, design software, and multi-object editing. It belongs to Outlined Fill - Streamline Material set in the Streamline Material family.