Step-by-Step Instructions for Adding a Confidential Watermark in Excel
1. Open your Excel spreadsheet and go to the 'Insert' tab. 2. Click on 'Header & Footer' and select 'Custom Header'. 3. In the 'Header' box, type your confidential watermark text. 4. Adjust the font, size, and color of the watermark as needed. 5. Click 'OK' to apply the watermark to your Excel sheet. 6. Save your Excel file as a PDF to preserve the watermark for distribution.