Configure Minimum spend and Maximum spend
In product configuration \ PDF Vouchers configuration section.
in Coupons panel add fields Minimum Spending and Maximum Spending.
When generating the voucher, in the standard COUPONS section “Usage Restriction” of WooCommerce, set the previous fields in relative fields Minimum Spending and Maximum Spending.
Is useful for advertising customer that they’re using only a part of the voucher and they will lost remain when voucher is not partially redeemable

Hey!
We’d just like to let you know that we’ve added this feature in version 4.1.0
Read more: https://docs.wpwebelite.com/woocommerce-pdf-vouchers/pdf-vouchers-setup-docs/#metabox_coupons
Enjoy the new releases!
Cheers
- (Inactive) commented
I’ve seen.
Thank’s a lot and congratulations for the efficiency of the support