Extract the zip file.open the 3.x folder.Upload the advancepdfinvoice.ocmod.zip file from Extensions > Installer. Refresh the Modifications from Extensions > Modifications. Please grant the permission to the user groups. Then Go to Extensions > Modules.You will see the Advance Pdf Invoice menu. After successful install You can configure the settings as per your requirements.

Extract the zip file.open the 2.3x/2.x folder.Upload admin folder to your server from the "Upload" folder.
Upload the install.ocmod.xml file from Extension Installer. Refresh the Modifications from Extensions > Modifications. Please grant the permission to the user groups. Then Go to Extensions > Modules.You will see the Advance Pdf Invoice menu. After successful install You can configure the settings as per your requirements.

General Tab - Enable/ Disable, add Logo , Enable/Disable QRcode. Select Invoice Layout Style and Show/Hide fields for invoice. Add Invoice Heading , custom header and footer text. Show/Hide fields for Shipping Slip. Add Shipping Slip Heading , custom header and footer text. Set Pdf font-size, font family,orientation and format.