Vital CRM
A4 two-fold envelope mailing information printing
It refers to the process of printing the necessary mailing information on an A4 size paper, which is then folded twice to fit into a standard envelope for mailing purposes. Recipient information will be printed on the vertical middle part of the A4.
Go to [Customer > Tools > Print Mailing Labels]※This is a special format, not suitable for mailing label stickers!

https://faq.vitalyun.com/EN/CRM#4390