In general, users who visit websites or applications don't understand the technical aspects. Such users evaluate systems based on the user friendliness, simplicity, and richness of the interface. Hence, we need to think about the design of the admin pages. Most WordPress clients don't prefer the default interface as it is seen commonly by the users. This is where admin themes become handy in providing application-specific designs. Even with admin themes, we cannot change the structure as it affects the core functionality. But we can provide eye-catching interfaces by changing the default styles of the admin theme.
Building a complete admin theme is a time-consuming task beyond the scope of this chapter, as we need to define custom styles for all the existing CSS selectors. Therefore, we are going to provide a head start to the admin theme design by altering the main navigation menu. Let's start by creating another plugin called wpwa-admin...