I want to customize and change the invoice format. How can I modify the standard invoice template?

To customize and change the invoice format, you need to follow the below steps: 
 Step 1: Go to Administration. 
 Step 2: Select Configuration. 
 Step 3: Choose invoice or document printing. 
 Step 4: Click Advanced. 
 Step 5: Select Sales Invoice as the document type. 
 Step 6: Modify or customise the default invoice template. 
 Step 7: If you are still unable to modify or customise the default invoice template, contact your local partner dealer at BUSY. They can provide chargeable support for this. If your local partner dealer cannot assist, consider contacting BUSY on a chargeable basis for further support. 
 These steps will allow you to customise your invoice format according to your needs. 
 AND 
 To modify the standard invoice template, you can not modify it, you can set it Yes or No as per your requirement, for this you need to follow below steps: 
 For Standard Format: 
 Step 1: Go to the Administration menu. 
 Step 2: Select Configuration, then Invoice/Document Printing. 
 Step 3: Choose Standard, and then select Sales Invoice. 
 Step 4: In the sales invoice settings, you can enable and disable the setting with Yes or No.