Approaching the problem digitally

Do you have any recommendations for how to approach marking the premises, subsidiary conclusions, and conclusions in a digital format of the LSAT? Is it in my best interest to either 1) not annotate anything and try to memorize what was the premise and conclusions and review if needed or 2) use scrap paper in some way to make it easier? Any advice here would be helpful! It seems like it would be really helpful to take the strategy Mehran does in the lesson of underlining, but I don't see an obvious strategy to approach this digitally.