[Therion] Feature for the wish list

Hello Just been working on some complicated surveys, and inevitably when surveying new passage in the cave you draw a cross section and then the new cave goes over it, or even over itself. It strikes me that in xtherion you can hide images, I think that it would be really useful if scraps could be hidden then you could draw one scrap then hide it and draw the scrap that is under it. Currently I import the image twice and draw it displaced, but that has the disadvantage that the scraps do not automatically join. It is very minor, but if easy to do would be a really useful feature thanks Andrew