You can split a command onto the next line with ^ provided the next line starts with a space. eg.
robocopy C:\Backup X:\Backup^
/XD "C:\Backup\Excluded 1"^
"C:\Backup\Excluded 2"
Welcome to MUNDY.CO - IT Knowledgebase written by Daniel Mundy from Adelaide, Australia.
Need help with anything? Email
This email address is being protected from spambots. You need JavaScript enabled to view it.
or call 0407 175 859.

You can split a command onto the next line with ^ provided the next line starts with a space. eg.
robocopy C:\Backup X:\Backup^
/XD "C:\Backup\Excluded 1"^
"C:\Backup\Excluded 2"