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

The Triangle Maximize Window Fill icon shows a rounded square window frame with a bold diagonal arrow pointing toward the upper right. Drawn in the solid style on a 24px grid for clear, consistent UI rendering. Use it for maximize window controls, fullscreen actions, expand buttons, and responsive workspace interfaces. It belongs to Outlined Fill - Streamline Material set in the Streamline Material family.