Let’s create a beam using the following algorithm:
Make sure all other operations are canceled or press the ESC key.
Press the Ctrl+P key combination to go to the plane view.
Indicate the starting point of the beam ( in practice, when creating beams
in a model it is recommended to draw them up using the same direction for
indicating starting and endpoints, thus let’s conventionally set
up the direction from left to right, from the top-to-bottom.)