Hi LindaLou - If I could just jump in here, I believe I can refer you to a thread that will be just what you need:
https://community.auctiva.com/eve/forums/a/tpc/f/5796099...731047622#4731047622
PS - The description box on the one page lister has 2 modes selected by links at the top of the box: 'text mode' and 'design editor' mode. Design editor mode is the default and is the normal mode for creating your description. Text mode is for working with HTML (advanced users).