Step 1. Request the swipe file; Step 2. Fill out the request form; Step 3. Select 'Use Template for New Design'; Step 4. Sign in to your Canva account (or create a new one -- there is a free option); Step 5. Design a new custom banner for your profile by editing the template. 

💁🏻‍♀️ Pro Tip: I'm guessing that most people will interact with your profile on either the web or mobile, so I recommend leaving the profile image markers and trim lines for the mobile option in the file until you are done to ensure everything you want will show up across all 3 platforms (web, mobile, app).