: This extension allows you to import point clouds from lidar, drones, or photogrammetry. You can model directly on this data to ensure "point" accuracy for as-built conditions. Surface Mesh Tool

If you do not see the colored inference dot, do not click. If you are not holding Shift to lock an axis, assume you are wrong. If you are drawing inside a group and need to connect to the outside, press Alt .

To facilitate this link, several professional extensions and ecosystems are used: Making Control points in a model - SketchUp Forums

Create a roof truss component. Lock the heel (bottom corner) of the truss to Master Point A1 as well.