Missing selection handles
Sometimes, even though you are clicking on the edge of your object you just can’t get the selection handles to appear around your object. Many people will tell you to close DS and reopen it and they’ll reappear. Well, yes they will... but there’s an easier (and quicker) way.....
Press the ALT key! Just like you use the ALT key to make the handles disappear, it will also make them reappear.
I don’t know why they go missing occasionally, but at least now you know how to get them back!