Originally posted by Tauqueer Ali:
You might want to use a collaboration diagram if the sequence diagram is taking too much horizontal space.
I don't think that the used space should be the deciding factor.
You should decide based on wether you want to show the structure of the collaboration or the chronology.
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus