In some countries customer details is required to be on the left side. With CRM you can achieve this very easy by navigating to Setup->Settings->PDF and set...

If you dont want transactions/payments to be shown on the invoice pdf document you can turn off by navigatin to Setup->Settings->PDF and set to NO Show invoice payments (transactions) on PDF...

There is protection implemented to keep the numbers without gaps, by default delete is only allowed on the last created estimate/invoice. If you don’t need this protection navigate to...