Annotation helps you to prepare in two ways.
First, you have to think carefully about your thesis while you add the notes or emphasis you need.
Second, you have a more helpful resource for your viva.
Annotation is effective when you do it in two stages.
First, think carefully about what you really need or want your thesis to have. What do you want to see or find more easily? Make a list.
Second, consider how you will do each of the items on the list in a clear and consistent way. How can you make your annotations simple so they don’t confuse you?
In the big picture view of viva prep, annotation is a few more words to add to your thesis to help you get ready. With a little thought it can be a relatively simple exercise to make your thesis better.
What do you need? How will you do it?
