I am looking to flip over this piece of paper and have only one side say packing list.
What you are going to need to do is separate the cube into “faces”/ or “planes”. Apply the texture material to the plane you want it to be displayed on. Then reassemble the planes back into a cube. To make things easier, apply separate, one color textures to each side that you want to single out. That way you can “drag and drop” or apply different materials to sides of the cube, you want to change, on the fly.
P.s. this is also a way to reuse meshes for many uses. You could reuse the mesh swapping out the texture to make them look like other things. In your case pages or what ever
Was the piece of paper created using modeling mode create/box? If so after you scale the mesh to your desired proportions, make sure to bake the scale value using xForm/bake transforms. Once that is done you need to adjust the UV’s by default each side of the box has UV’s that are stacked on top of each other that is why you are seeing the text repeated on every side. You can use the UVs/Unwrap tool to get a better layout of your UV pattern. The transform UV’s tool is also really helpful since you can click on an island and transform it interactively.
You can also use the UV Editor to adjust the UV layout if you want to get more options. You can get to the UV Editor by right clicking on the mesh and selecting UV Editor.
Hope that helps,
R