You can insert or add Header and Footer in Excel spreadsheet using this tutorial. Insert page number, current date and time, etc.

If you want to add a footer to an Excel spreadsheet, click the "Insert" tab on the ribbon menu. Then click "Header & Footer" within the "Text" group of options.

You can add alt text descriptions in Excel to any kind of illustration, including photos, screenshots, shapes, 3D models, and Smart Art.