When you first visit your portfolio, you will find it stocked with templates that show you how to showcase videos, images, and audio recordings right in your profile. Each template has tips for structuring your portfolio items, so be sure to read through each one. Then, you can edit the existing templates as needed or start with your own blank template. When editing an existing template, simply delete and replace the media additions, then fill in the rest of the document with your own text.
Each time you open up a new portfolio item, you will be able to choose from a blank or premade templates. The premade templates are the same ones that are seen in your profile when you first open it.