Only able to select one face?

Before you tell me there is already a post for this, don’t. I’ve looked at that, and the only solution that was given to the asker didn’t work as I was already in the mode they told me to go to. My issue is that I can only select one face on a cube brush I need to use for an important part of my game. I’m trying to duplicate it but it keeps only duplicating a couple of faces while the others are invisible but are still there. My details panel changed to show the subtraction and addition options, and I just started using the program not that long ago so I don’t know how to change it back.

Pic:

109381-screen+shot+2016-10-02+at+2.05.25+pm.png

Hi KnotSnappy,

Are you in Placement Mode or Geometry Mode when this occurs? To select specific faces, you need to be in the Geometry Edit Mode.

109483-modes.png

Try pressing Shift+B to select all faces.

I know that this was months ago. I fixed the issue, but this answer was to the exact opposite of my problem. I was only selecting one face, I wanted to select all. Turns out I was at the end of the world.