No variety of highlight colours

does Adobe Digital have this option?  this is my only drawback with this app.  i really wish the iBooks app and Adobe Digital could be amalgamated to give me the options I need.  i love iBooks and can do a lot with it, but they just do not have a larger text box to read from, but they have various highlight colours to choose from.  Having to hold my iPad and scroll to get all the information from note box is proving challenging and difficult.  Adobe Digital has a large note box, but not enough highlight colours to support the various points in an article.  Is there an app that can combine these elements to give me optimal use of my study articles.

from Carol