You can refer to the following example to see how the section looks in a live site: http://x-template.weebly.com/home-3.html
Step 1: Drag & drop X element
1.1. Within Weebly Editor, click on Build tab, navigate to STRUCTURE then drag and drop Section into the right position of your building page.
1.2. Click on the section then choose Edit Background > Color > Change Color. Enter the 6-digit HEX code #111111 (black color) into the field.
1.3. Navigate to THIRD PARTY then drag and drop X into the section.
Step 2: Choose display mode
Click on a blank area of X and choose Normal in a pop-up Settings box.
Step 3: Choose column structure
In the Setting box, click on Configure Layout Settings to show the Settings panel
3.1. Click on LAYOUT.
3.2. Choose the 1/3 - 1/3 - 1/3 layout.
3.3. Click on SETTING.
3.4. Turn on Equalize Column Heights option to make sure you set equal height for all three columns.
3.5. Set font sizes for title and text.
Step 4: Customize each column
Corresponding to each column, click on each box to create your own custom settings that include: background; title and text color; border color, thickness, types; padding; effect; etc.
Click on Done button at the right top of the screen when you have finished with editing.