A theme layout provides the ability to create a common header, common footer, search box, navigation menu, profile interface, and content layout. The content layout can vary from one page to another and can be changed. Salesforce out of the box also provides a header, footer, search box, navigation menu, and profile menu. However, you can customize and override them further by implementing various interfaces.
In this section, we will create a theme layout, as shown in the following diagram:
To build a theme layout, we can leverage SLDS Grid (https://www.lightningdesignsystem.com/utilities/grid/) as the starting point. ...