Email templates

HI team

I have questions in Email templates as this the first time im building a complex Email template .Could you please assist me

  1. In the body , If we have use a fieldvalue we use %Purchid% . What if i have to use a field which is not in PurchTable . For Ex. I need VendorName which is not in Purchtable , only OrderAccount is available . Can i use Display Method vendorName? or should i use %vendorName()%

  2. How do i do the attachments . Lets say i wanna attach PO report when this PO approval Email triggers. How do i do that in Email templates?

Could you please assist?