I have a project in AE that consists of some lines that move around, and i want to zoom into one of thos lines so the lines take up the whole screen. I tried to do this in a few different ways and i wasn't working. I used cameras and a few other position things. Can anyone help me out.?????????????????

Have you tried scaling the line you want to zoom into?

If you are dead set on using 3D layers and a camera layer, make sure you adjust the Point of Interest for the camera at the line you want to zoom into, and then move the camera along the Z-axis until the line fills the screen.

Cheers