Vertices not being added at my cursor position.

Using the line tool in DraftSight, I find that the vertices of the lines aren't being plotted at the postion of my cursor on the screen.

Instead, they appear somewhere seemingly random in the sheet.

the only thing that I can think of that's odd with my setup is that I'm usig two monitors (not uncommon).

Has anyone had this problem before and have a fix for it?

 

Thanks,

 

Andy