How to write anticipated chords and control staves length?

Thank you, Daniel and FredGUnn,

I could get something quite even adjusting the Custom spacing ratio.

Thank you DWR-keys

You are right, actually, this score is from a Japanese musician.
I would like to work within Dorico, so the replies of Daniel and FredGUnn
explaining that I get something close with the Custom spacing ratio is good for me.

Thank you stevenjones01,

Your approach is very interesting!
I will stay on the Custom spacing ratio for now but I definitely keep in mind for further projects.