In page https://help.sketchup.com/en/sketchup/adding-premade-components-and-dynamic-components the pix in the Inserting components paragraph is missing.
I guess it is this one:
Same for Organizing components collections.
Should be this one?
And just below, the numbered list has a typo: extra 1.
As soon as I’m done with my reading, I’ll gather all comments in one message.