There is a couple ways of doing this. Don Mason types the chord changes on the same line as the lyrics. If I recall, he may place the chords in brackets.
I usually type mine over the word where the chord changes using MS Word, or Word Perfect, then save the file as a .txt file so I can view it in any word processor, or on the keyboard screen, which some folks prefer.
There are several sites where you can download the lyrics with the chords appearing over the word where the changes take place. Additionally, with some sites, you can transpose the chords, which is very beneficial to those that sing and the original chords are out of your vocal range. Makes life a lot easier.
I think you can view text files on most pads without special software, at least I can on my Kindle Fire HD. Not sure about the others, though. The reason I like the netbook PC is that I can make and save changes, which saves a lot of back and forth time to the Desktop PC.
Hope this helps,
Gary