My goal is to make a user manual WP site for the web app that my company is selling.
My issue is that the web app has some differences in functionality for different clients. For example, we have a web form for managing contacts (first name, last name, address, etc.) and this web form may differ from client to client, as some want it to have a button to start a Skype call while others don't want to see this button on their version of the interface.
As there are differences, the user manual will differ (different screenshots, different description). But approximately 80% of the manual will be the same.
So what I wanna do is create a single manual (using Posts for different sections of the manual and Pages for different clients) where some parts will be different, depending on a Page (depending on a client, who is viewing the manual).
How should I approach this? Should I look for a plugin to extend the Post Editor to allow for various conditions? Should I write something myself?