From the Wordpress Dashboard, go to Appearance > Customize to access the customizer:
Once the customizer is open, you'll see a menu on the left and a live preview of your site on the right:
The customizer menu on the left side shows the various options that are available for customizing your design with Mai Pro. On the right side, you'll see a live, interactive preview so that you can instantly see the result of each option in your theme. All changes will appear as you select them.
To see the settings available within each option, click on its title to open that option’s expanded view.
When you are finished making all your changes, click Save & Publish. If you decide you do not want to save the changes you've made, click the X to close the editor and dismiss your changes.
Check out our YouTube videos to see how to use the Mai Lifestyle Theme demo Customizer: