I can center buttons and text based on the alignment with the typography section, but if I put a placeholder image in my project, there's no way to center it across the row that I see. I had seen a way to do it before, but now I don't know what happened to it.

Also, I am trying to add a background color on my row and change my font color, size etc. I have done so as I want it to look on small mobile devices, but some of the fonts come up black and plain. Not what is pictured. Any suggestions?

Also, one more thing. The button attempts to center under the center alignment, but it doesn't actually center. It is slightly off center. Any particular reason why? Without messing with padding or margins it does this.

In order to center an image, you need to have it display: block; and margin: auto;

For your other questions you first have to tell us which programme you are using.