Board Thread:Fanon Canon: Applications/@comment-25152698-20140901060608/@comment-25152698-20140903000936

As stated in the application, the logs contained detailed descriptions of some of Madara's techniques. This would include what some believed to be the hand signs he used, (with every log containing a different set of hand signs, Sayuri would have to work her way around a trial and error session to figure it out for herself) as well as the outcome of the attack.

For example, a log may have stated, "As Madara drew together his chakra, what seemed like a meteor forced the clouds to part in different angles"

Of course they would not be like a scroll of techniques, but detailed descriptions from several points of views. However, learning the techniques would go about the same way, with Sayuri learning it on her own.

Another example. How did Naruto learn the shadow clone jutsu? Through a scroll.

As stated before, the logs were no scrolls, but descriptions. That being said, as Sayuri has, similarly to Kakashi, copied many techniques through her lifetime, she would spend quite some time figuring out how to use the mentioned techniques.