Hi Michael ;)
A list very short (in caracteres) will be useful for compare the different options for help to choice (and understand) for feedback!
Because in a full text it's not very easy!)
Something like
Object Selected
Click Right Mouse =
Click Right Mouse + Shift =
Click Left Mouse =
Click Left Mouse + SHift =
Objects not Selected
Click Right Mouse =
Click Right Mouse + Shift =
Click Left Mouse =
Click Left Mouse + SHift =
etc...