I'm new to Omnigraffle and am trying to create a simple flow chart, but, I'm finding the lines to be a bit perplexing.

I'm trying to draw a line between two boxes, I want the line to have a series of turns that are all right angles connecting the boxes (while going around others).

In "Connections" I saw a line that's similar, I just need to change the points (create more turns, add additional segments) but I can't figure out how to do this.

All help is greatly appreciated.