I'm afraid I don't know/remember if it was an option on Start10, but it is on Start11. You might look in Start10's appearance options etc., and/or check your downloads after logging in here (icon in upper right) to see if Start11 is available to you:
Here it is on Start11:
Otherwise someone more familiar with Start10 will be along later.
(I see Basj came by while I was playing with pictures. )