To find the configuration settings for invoice printing, you need to follow the following steps:
Step 1: Go to the Administration section.
Step 2: Then, click on Configuration.
Step 3: Within the Configuration menu, select Invoice or Document Printing.
Step 4: After that, go to the Advanced settings.
Step 5: Next, choose Sale Invoice.
Step 6: Now, select the particular sales invoice format that you need.
Step 7: Here you can configure your customised invoice printing.
Step 8: When you do this, your customised sales invoice will be in the designated location, as per the format you've chosen.