Sometimes it is easiest to learn by example (original found online with a Google image search). Looking at this thumbnail, can you tell where each section is? You should not have to read a heading to know that it is a heading. Left of the white space is where the image is a bit confusing. If you look at the full image, you’ll see that there are four sections, but the underlined “WOMEN’S UNIVERSITY” can throw off your eye. I recommend avoiding underlining altogether. I strongly recommend not using all caps for anything other than a heading.