How do I make a line on a cube?

[cheeky pete]

help

[Ad Hominem]

You're gonna have to be more specific as to what you actually want. Are you just talking about adding new verticies and edges? CTRL+R will do that.

[cheeky pete]

I'm making a gun magazine and I'm trying to do the little lines on it.

[Ad Hominem]

Oh so where the magazine is mechanically different parts?

There are a couple ways you can try. You can use a boolean object that is a plane with a very thin solidify modifier on it, but this can have really funky results if your topology isn't pretty good.

Or you could try just selecting the part of the mesh that you want to be physically separate and press P to separate by selection, and then add a bevel modifier to both parts. That will round out the edge where the two new pieces meet and it will appear to have a line.

Or just create edge loops where you want a line and then CTRL-B to bevel them, and make the bevel only have 2 segments and make the bevel very thin, then extrude+scale the thin new faces to create a line.

[Pte Jack]

Are you trying to texture lines on to it or are you trying to model lines into it? Upload a screenshot of what it is your actually trying to do.

[⎛⎝d34dr00⎠⎞]

I think he/she means edges.