Write User Manual

Do you know how to write user manual? its for app we made Please check the link for the app. and PDF file attached is like an example what we need ! There are some detail on the progress evaluation The app is when you are on the line with some one then he put you on hold like when you are calling a company or something they put you on hold for 10mins may be or more. so our app is at that time when you are on hold, you can open the app and turn on your own music! While waiting !! You open the application and select a music from your own list! This is the only feature i think ok and after the hold The call go back to you on line and your music shut down by itself when the call is back by itself This is our app and we need user manual like the file attached as an example. Its simple , not complicated that much. Budget : 15$