Omnigraffle - how to make double ended arrows? I'm learning Omnigraffle and am ok with most shapes. But I want arrows with heads at each end, like this (done in Pages.app):



I'd also like to know how to put the tips of the arrows where I want, rather than Omnigraffle's default which is to attach a line to a corner:, like this:



Following Dave Delong's answer below, I realized that you have to style each end of the line.

Like so:
Select the line (or lines) in your OmniGraffle document
Open the Style Inspector (Inspectors Menu &#x25B8; Styles, or &#x2318;-1)
Select the second style inspector ("Lines and Shapes")


Use the popup menus to choose an arrow style