How to make end arrow appear

Hi all,

I was interested in creating a diameter dimension with horizontal text and both start and end outside arrows on the circle drawn. Apparently SW has grayed oud this possibility in the PropertyManager. (See screenshot). My overall drafting standard is ISO, and despite having read all the options related to arrow dimension and placement, I was not able to determine how to accomplish this.

Sorry I had to attach the image file rather than insert it because the insert feature was not working at the moment I wrote this post.

TIA, Eduard

SolidworksDrawings And Detailing