You can easily change the appearance of your site by activating a new theme. Follow the steps below to publish your new theme.
Step 1: Access the Theme List
From the preview of your site, go to the Theme Manager on the right side of the screen. You will see the list of themes available for your site.
Step 2: Activate the New Theme
Click on the three-bar icon (•••) to the right of the theme to see a preview of this theme
If you like it, click the Play icon next to the selected theme
A pop-up window named Theme Activation will appear
Click the Publish button to confirm that you want to make this new theme active on your site
Your new theme is online! You should see the changes on your site within 15 minutes. If you change your mind, you can always reactivate a previous theme by following the same steps.