On the mark
Meanings of "On the mark"
On the right (measurement) point, exactly where one needs to be. It can be at a predetermined point where someone/something travels, goes to. To be just at the exact level, volume. "I filled the litre container to the top and stopped the water. I was on the mark."
"On your mark!" can be a preliminary command to put your foot in the proper place when a race will begin so it has a different meaning.
"On the mark" в текстах
Heroes in the movies, all wear mask when night comes
The me in reality relies on the mark of you wiping away the tears
Rescue yourself requires more bravery than rescuing the world