How to overlay textures?

Hello, it seems like I used to know how to do this but I don’t know how anymore. How do I overlay multiple textures? For example, a normal map, a texture, and a third map that I’m unaware of what kind it is. I want these all to overlay over each other so I can see the textured object with the bumps of the maps on top of it. Right now I have three materials but only the normal map is showing up in white.

No indication on the renderer you use so assume it’s the default renderer
No supplied blend file with textures packed into it so cannot say exactly what you are doing wrong

Add material
Add Textures
Set texture mapping
Set what the texture is to influence (colour, specularity, alpha etc)
Set the blend mode

Textures are applied from top to bottom in the stack