I understand but i don't succeed. When i mark a first item between the blue and red spots A-B, and i click right "Use tis frame for thumb frame" that's ok. But when i take the item B-C and click right and do the same, the new file B-C will overwrite file A-B. This is not the meaning, is it. Even if i make as many bins as i want the new ones always overwrite the former bin-file.