But the original question, is there any way to mark a boulder track when you are in boulder wars? I thought I spotted one this afternoon and I marked it as a linear feature. Now when I go back to "my moon zoo" it's difficult to navigate the images as the links are all identical (that is, I say to myself, I've checked images 1-10 in the list, now I scroll down, but where am I in the list? Which ones have I not revisited yet?) Thanks.