Once the extension is installed successfully, go to Stores > Configuration to configure the extension for use.
Checkout Custom Form – Enable or Disable extension from here.
Add Custom Field 1
Title For Custom Field 1 – Add the appropriate title for your custom field here.
Want to show Custom Field 1: Select YES if you want to display the custom field 1. Select NO if you don’t want to display the custom field 1.
Sort Order for Custom Field 1: Add the sort order number where you like to display the field.
Note – Fields 1, 2, 3, 4 are for Text custom fields and Fields 5, 6, 7, 8 are for Textarea custom fields.