Using the Line Tool

This three-dimensional widget defines a line that can be interactively placed in a scene.

The line has two handles (at its endpoints), and the line can be picked to translate it in the scene.

To orient and stretch the line, click on one of the two end point handles and drag it. (The other end point remains fixed.)

To scale the line from its center, click and drag with the right mouse button up or down. The upward direction makes the line bigger, while the opposite direction makes it smaller.

To translate the line, drag it while holding down the middle mouse button. All of the translation interactions can be constrained to one of the x, y or z axes by using the <Shift> key.

The handles and line can be picked even when it is "behind" other actors. This is an intended feature and not a bug.