Add Layer 1 is a line-style Icon from Core Line set.

The Add Layer 1 icon shows a rounded square with a centered plus sign and a second offset outline suggesting a layer behind it. Drawn in the line style on a 14px grid with a 1px stroke so it stays crisp and spacious at small sizes. Use it for adding layers, layer panels, design tools, and content management interfaces. It belongs to Core Line set in the Core family.