Show a PDF in one of two ways. PDFs can be placed in iTunes and synced with the iPad, or they can be emailed to your own account. Give both methods a shot and see which one fits into your life bests. It may even be the case that using a combination of both methods works for you.
Go to Edit> Preferences (Windows) or iTunes> Preferences (Mac). Click Advanced; we’re interested in where it says ‘iTunes Media folder location’. The folder we need to copy is called iTunes (not iTunes Media).