Select use gauge table.
Convert to sheet metal part solidworks.
In the propertymanager under sheet metal gauges set options if you want to use a gauge table.
To convert a solid part to a sheet metal part.
Click convert to sheet metal sheet metal toolbar or insert sheet metal convert to sheet metal.
This tutorial shows how to convert cylindrical hollow solid part to sheet metal cylinder.
Create the solid part.
Here we have a solid body that i would like to convert into a sheet metal box then get the flat pattern to make.