dummymark
nounUK /ˈdʌmi mɑːk/
US /ˈdʌmi mɑːrk/
A dummymark is a pretend mark you make to test something before you do it for real.
She drew a dummymark on the paper to see where the sticker would go.
OTHER MEANINGS
2. A temporary mark used in printing to show where text or pictures will go.
The printer added a dummymark to check the page layout.
3. A fake or practice target used for aiming games.
The kids painted a dummymark on the wall for their beanbag game.
4. A small sign that stands in for a real label until the final one is ready.
They put a dummymark on the box so nobody would forget what goes inside.