When I insert a picture, and I paint it wrong I generally do it wrong (lol) and I don't know how to erase de picture (not delete the full picture, I just want a erase instead a painter in mouse).

Another probleman is that when I am telling the 3D graphics his coordenates, it disappears, is there anyway to fix it?

Sorry my bad english.
Plz reply!

Dear Ernarist,
About the picture issue, it's not yet possible edit sketches that you do inside a picture region.
Please could you upload an example of the 3D graph coordinates issue that you mention?

Regards, Oscar