Q1) Suppose customer canceled the order in that case what will happen ? pdf should not available for cancel orders right??
Yes of course PDF would then be disabled for cancelled order. For giving power to admin we have added selection of order status for which PDF would be enabled. So admin can decide based on the store requirements for which status PDF should be enabled for customer.
Q2) Does this extension allow you to attach the invoice to the order email that is sent to both the customer and admin??
Yes you must enable this in module settings. Then PDF would come attached in order emails.
Pdf is attached to email on both sides : Admin and customer.
Q3) the date on the invoice is the current day or is the day when the order have been placed??
The date of invoice is the date when Invoice number is generated. We have autogenerate invoice number feature in built within this. So it would do the job perfectly.
Q4) Can PDF support languages like russian, chinese, araibic, etc? ?
Yes it supports.
Q5) how to add my own signature in footer of PDF ??
You can upload your signature image in module settings. And PDF would show it.
Q6) how can I localize the name of the pdf file??
The name of PDF file is controlled from language files that comes in the zip. Just add your desired name.
Q7) Does the extension work on custom themes ??
Yes it works on all themes. If it does not work we provide premium support if you purchased the extension and your license is valid.
Q8) will this work with Journal 2 theme ??
Yes it will.
Q9) Can the PDF Invoice be customized ??
Yes, it can be customized. It's an HTML / twig file which can be edited and modified as per need.

For 2.x Version:
The file to edit is for the admin side:
admin/view/template/portdf/invce1.tpl

The file to edit on the catalog side is:
catalog/view/theme/default/template/portdf/invce1.tpl


For 3.x Version:

The file to edit is for the admin side:
admin/view/template/extension/module/pdf_invoice_template/invce1.twig

The file to edit on the catalog side is:
catalog/view/theme/default/template/extension/module/pdf_invoice_template/invce1.twig
Q10) Can extension work with different payment methods ??
Yes. The PDF will be attached with HTML email.
Q11) Does this support multi store with same admin ??
Yes it supports.
Q12) Can you add electronic/digital signature to PDF Invoice ??
This is not present in extension as 95% users don't have certificate. So if you need we can do this customized work. Contact on our email address : support@cartbinder.com
Q13) Can we have date format as per our country ??
Yes date formats are controlled from language file. So you can have like m/d/Y or d-.m-Y
Q14) is it OCmod or VQmod ??
Ocmod for 2.x and 3.x
Vqmod for 1.5.x
Q15) Autogenerate invoice number - this occurs at the time of creation or when any of the set status criteria is met ??
It will generate only if the marked status inside PDF is selected. For other order status it will not be generated.
Q16) Invoice number creation date - is this the order creation date or based on point (a) as above ??
Invoice no date is based on the generation of Invoice no. Not based on order date.