If you have an iPad you really should check this out.
This app stores your PDF patterns and has a nifty little bar you can turn on and move from line to line to mark your place in a pattern. For lace knitting, highlighting your rows is a must!
In all honesty, I downloaded the free version, but I like it so much, I'm seriously thinking about paying the 9.99 for the pro version.
When you get time, check it out. I think you will like it.