The leader in the drawing environment only attaches / snap to the edge of a drawing, which is fine when you have a drawing to work with. When a image or photos are imported in to the drawing environment the leader does not attach to anything as it can not find a edge to attach / snap to, so the work around is to get a leader from the sketch contextual environment, this enable the leader to be placed on any surface of the image / photo, well this is what I've found that worked for me, and I put my hands up, I dont know how I got it work in the past, when I was just playing around as a new user ( I am still learning about fusion). Now, came back to do some work, the sketch contextual environment just gives me a leader with arrow and no tail. The work around I found works also, is to copy the leader from old drawing and copy and paste in to the new sketch drawing. Please see the attached photo. I labelled it as "Test".
You, mentioned that, this is possible from a "text area"? I dont know which is a text area and how to I get it work with image / photos?
I appreciated that you will look in to improving the sketch contextual environment (if thats whats it called), I have googled a lot to get some understanding of different environment and workspace and still not clear which is which. The issue i have, is when working in the template area, then use the sketch tool, and seems like a problem on the other tools, cant put a dimension to a circle. I will create a different thread for that.