Notes from onshape talk by User:Matt
Starting with 2D Sketches
Begin CAD designs with 2D sketches on planes, then extrude to create 3D shapes.
Dimensioning
Proper dimensioning ensures accuracy, transforming sketches from blue (undefined) to black (fully defined).
Extrude Tool
Converts 2D sketches into 3D objects. Options like "new," "add," and "remove" are key for modifying shapes.