Final answer:
To insert an extra invoice line before the first line, click on the first line, access the edit menu, and select Insert Line. Ensure proper formatting by beginning each entry at the left margin and using indentation where needed. In Word, use the Hanging indent option for a professional look.
Step-by-step explanation:
To insert an extra invoice line before the first line of a sales invoice, the standard procedure would be to click anywhere on the first line of the invoice, go to the edit menu, and select Insert Line or a similar option, depending on the specific accounting or invoicing software being used. This action should insert a blank line above the first line where you can then enter the new information. This method ensures that the formatting and numbering of the subsequent lines remain consistent. It is important to remember to begin each entry at the left margin, and indent subsequent lines one-half inch for clarity and professionalism in business documentation.
However, if you are using a program like Microsoft Word to manage the invoice, you can click at the beginning of the first line, type the new information, and press Enter, which will shift the first line down. After entering your new first line, ensure to format it correctly. In Word, you can format entries by highlighting the text and selecting Hanging from the Special options in the Indentation section of the Paragraph menu. This is important for maintaining a professional appearance of business documents.