Making format changes to the entire workbook instead of individual worksheets

Welcome to Numbers!

Numbers can be more convenient than Excel for many projects. But it doesn't work the way you describe.

And the language used is different.

For "workbook" in Excel say "document" or "spreadsheet" in Numbers.

For "worksheet" in Excel say "sheet" in Numbers.

But keep in mind that a Numbers sheet (tab) does not contain a grid of cells like an Excel worksheet. A Numbers sheet has a blank canvas on which you can place multiple tables, charts, and other objects.

Each Numbers table contains a grid of cells in rows and columns similar to what you see in Excel. You can have multiple tables on one sheet.

If you haven't done so already be sure to have a look at Help > Numbers Help in your menu. Also have a look at the templates at File > New in your menu. These will give you an idea of how best to construct your Numbers documents.

SG