Display Partial Invoice Number on Email & Printed Invoices, Omitting the Leading Zeros
Select Setup > Customize Forms
Select Invoices
Select the invoice type
Click Customize
Double-click in the *Invoice #* field to open the Format or Properties window
Click to right-justify the data in the field
Click the edge of the field to make its width smaller
As a result, only the right portion of the invoice number will be displayed; leading zeros will be truncated.
Also consider customizing the Transaction IDs for each transaction type to define a four character prefix and next number sequence for auto numbering. Select Setup>Transaction IDs.

