Being on the Vendor Card the user can specify what is the vendor`s maintenance email.
When vendor is used on the work order (also taken from plan) - the hidden (by default) field is filled with proper data:
If user wants to change this value on the work order page - it always can be changed. But the field must be added by personalization.
Being on the Work Order Card or on the Work Orders List - the user can use Send action.
The email is created but not send yet. The user can do some changes or send the email.
Body of the email contains some basic information about the work order, and the attachment with the printout is added to the email.