Good PDF for reference.
I also like the video by KYB. Very understandable.
https://www.youtube.com/watch?v=0FEIDAFDnTA&t=436s
I will most probably change the shocks in a few weeks. The springs are not cracked. Can they be "tired" so that it would make sense to change them too despite the fact that they seem intact?
My Yaris 2007 is still on the original shocks and springs and they are nearly gone according to the suspension diagnostic test.