About the Thicken Tool in Sketcher
You can use the Thicken tool to add material thickness in Sketcher mode during the creation or redefinition of the following types of wall:
• Extrude
• Revolve
• Flange
• Helical sweep
Click > > . A thicken line, offset from your sketched line, represents the opposite side of the wall.
1. Thicken line
2. Sketch line