Implemented more than once the requested option realizing direct transitions in the visual editor.

To select this type of transitions, you need to activate the corresponding button.
Rotation, changing the direction of the line is as follows:
We draw a line when the left mouse button is pressed. At the turning point, DO NOT release the left mouse button and click Right. At this point the line will get a kink. We drive it further with the right mouse button clamped.

It also became possible to adjust the angle of inclination of the line along the vertical and horizontal lines, in which the line will be conducted exactly vertically and horizontally, regardless of the slight deviation of the mouse.

Video clarifying the nuances of this update: