SketchUp has an inference engine that helps you work in 3D space. For example, when the Line tool cursor is hovering over the midpoint of another line, the inference engine tells you by displaying a light blue dot and ScreenTip that says, βMidpointβ. Every inference has its own color and ScreenTip.
You can enable the Create Guide functionality in both the Tape Measure and Protractor tools by pressing Ctrl on Windows or Command on Mac to toggle it off and on.
You’ll use endpoints to create Guide Points, you can create Guide Lines using midpoints, lines or faces.
Want to learn more skills? Check out our SketchUp community forums: https://forums.sketchup.com , more videos on our YouTube channel: https://www.youtube.com/SketchUp , or SketchUp Campus: https://learn.sketchup.com
Want to use SketchUp? View our different plans:
https://www.sketchup.com/plans-and-pricing
Read our blog for more learning content as well as industry insights from architects, interior designers, urban planners, and more:
https://blog.sketchup.com
Follow us on Twitter https://twitter.com/sketchup ,
Instagram https://www.instagram.com/sketchup_official ,
Facebook https://www.facebook.com/sketchup , and
LinkedIn https://www.linkedin.com/company/sketchup
to stay up to date on our newest features and releases.
source