Cannot draw arrows or lines

[Blighty]

(01-19-2018, 03:45 AM)Stephen_A Wrote: Tried using pencil tool. I cannot make it create any lines, despite ensuring I'm on the right layers.

Make sure you are on the right layer AND make sure the layer is visible ie no layers above that will obscure the current layer.

Two ways to use the pencil tool:
1. Click and hold left mouse down. Draw. Release mouse button when complete.
2. Click at the start of the line (just a click, don't hold down). Now hold down the Shift key and move the pointer to end of the line. Click again (while still holding down the Shift key)

Can't help with arrow.scm, I don't have it installed.