[scribus] Lines

[Roger]

 > Similarly, I want to draw a straight line, and cannot find that in Help
 > > or the menus either.

Main tools toolbar or its on the menu too, under Insert. Also you can get
into Line draw mode by pressing L.

When drawing a line using the Line tool, hold down the CTRL key to fix the line 
to vertical or horizontal and draw the line.
I use this all the time.
Alternatively you can set the angle of the line to vert or horizontal or 
anywhere between by using F2, Properties  X,Y,Z  Rotation and entering the 
angle. I use this quite often as well.
Roger