Page layout marks the view of any object. It is the view of the Model-View-Controller paradigm of Salesforce. Page layouts are needed to collect, display, and update the data of the app. Every object has a standard user interface with one or more page layouts. When you create a custom object, the Force.com platform creates standard page layouts for us. The Force.com platform allows us to modify it and create new page layouts according to the requirements. Since page layouts are customizable, you can arrange page layouts according to the requirements of the application. There is no limit on creating page layouts for an object. We can have n number of page layouts for any object. Multiple page layouts are supported by the security aspects of the app. Page layouts can be assigned to the profiles or record type. (For more details about profiles and record types, refer to Chapter 4, Designing Apps for Multiple Users and Protecting Data.) Mainly, there are two different...