How do you set Ortho in SketchUp?
Use the Shift key on the keyboard, to constrain the Line tool to ortho mode.
Can you add a grid to SketchUp?
SketchUp is a 3D modeling application similar to Photoshop or AutoCAD. Unlike these programs, however, SketchUp does not have a grid feature to guide you while you are drawing your models. … If you want to view a grid on the SketchUp application, you must draw it yourself using the application’s LayOut Line Tool.