After you have created your main and/or side creatives. You can rearrange to define the position of the ad on your website.
To re-arrange the created ads.
Step 1: Select "Branded Space" under the "Branding" tab.
Step 2: Select the icon next to the filter icon as shown in the screenshot.
Step 3: Preview and reorder creatives for your main and side ads.
This can be done for each section of your event. Select the section under Creative Placement and save the positions for Main Ads and Side Ads.
Step 4: Click "SAVE & APPLY" to reflect the changes on your event.