Triangle Maximize Window Fill is a solid-style Icon from Rounded Fill - Streamline Material Free set.

The Triangle Maximize Window Fill icon shows a rounded window outline with a diagonal arrow pointing toward the upper right. Drawn in the solid style on a 24px grid for clear, consistent rendering at small UI sizes. Use it for maximize buttons, fullscreen controls, expand actions, and responsive layout tools. It belongs to Rounded Fill - Streamline Material Free free set in the Streamline Material family.