Years ago I too couldn't find this double arrow option.
So all I did was create a block showing the double arrow and leader line, then I just import this into a drawing when needed.
As this works ok I have never looked to see if this is now possible out of the box.
(SolidWorks 2015 sp3)
Thanks for the input Mark. I may create a block but do not come across a need for dimensioning in a section view that often with double arrows. Cya.
You can edit your section line so it goes past the model, place the dimension in the section view, then move the line back. Hide the extension line and dimension line. Next insert a note, with the same style of arrow and a straight leader. Hit your space bar in the text box to get just the leader and arrow. Position it as needed. copy and paste the second one and position it so it looks like a second arrow on the dimension. This is a little bit of a workaround, but it doesn't take too long and will get the job done until you find a better way. As Mark said, if this is something you think you'll need again you can save the double arrows as a block for future use.
Hi Glenn. Thanks for the info. I didn't see anything on the web but thought I'd ask in case I missed something. I did see kind info about the foreshortened double arrows but most of what I saw was related to diameters which I'm not dealing with in this case. I'll try out your method. Cya.