With a Free subscription, you have access to one project, simply called 'SketchUp.' With paid subscriptions, you can create more projects at. In either case, a Trimble Connect dialog will open.
After creating a new model, click either the 'Untitled' file name or the 'Save' command in the upper left of your screen.After you've created a new model, one of the first things you may want to do is save it to Trimble Connect.
