Blender 3D Printing by Example

Using Ctrl to multiselect

In Edit Mode, you can also hold down the Ctrl key while you are right-clicking. The difference is this will add the newly selected item, as well as anything else in the shortest path connecting the two. With the cylinder example, if I right-click on a vertex, that will become the sole active selection. If I then hold down the Ctrl key and right-click on another vertex, that end point is added to my selection as well as any vertices that are in between:

Ctrl + right-click will add all the vertices leading up to the new selection

There is a catch with Ctrl + right-click. Blender will use the defined edges of your model ...