How do I make the marching ants appear when creating masks?

I have tried just about everything. I'm working with images that need to be edited and have been using someone else's computer. Since I figured I'd be using it a lot I got it myself but its not showing up with marching ants/selection lines, whatever you want to call them, when I'm using any of the mask select tools so I can see what it is I'm editing in/out of my file. 

Is there a way of making them show up? if so how? if not what are other options I can use instead. TIA