There are many options to enhance your text in OmekaS by switching to the "<> Source" option in a HTML block and working in HTML. There are many resources available on the internet that can provide tutorials on scripts and how to achieve a desired outcome. The W3 Schools HTML Tutorial is a great resource to start with.
Adding columns of text to your page can be achieved with an HTML grid system. The Grid system uses a series of containers, rows, and columns to layout and align content. It's built with a flexbox and is fully responsive.
Below is the HTML script to produce these columns:
<div class="container"> <div class="row"> <div class="col"> Column </div> <div class="col"> Column </div> <div class="col"> Column </div> </div> </div>