Alt + O C S Mac Excel Shortcut: Legacy Standard Width (2026 Guide)

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Quick Answer

To do Alt + O C S on Mac in Excel, install Accelerator Keys, then press Option, then O, then C, then S. It runs the Excel 2003 command Format > Column > Standard Width. The modern ribbon shortcut is Alt + H + O + D.

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If you are looking for the Alt + O C S shortcut on Mac Excel, you may know it from Excel 2003, where Alt + O opened the Format menu. Windows Excel still accepts these menu keys. With Accelerator Keys, they work on your Mac too.

What Does Alt + O C S Do?

Alt + O + C + S is the legacy shortcut for Format > Column > Standard Width. It opens the Standard Width dialog. You set the default width for the sheet. Excel changes all the columns that you did not resize by hand.

Legacy vs. Modern Shortcut Comparison

Shortcut	Era	Menu Path
Alt + O + C + S	Legacy (Excel 2003)	Format > Column > Standard Width
Alt + H + O + D	Modern (Ribbon)	Home > Format > Default Width

Both shortcuts work with Accelerator Keys.

How It Works on Mac

On your Mac, Accelerator Keys runs Format > Column > Standard Width in the Excel menu bar. It works on any ribbon tab and at any window width.

Step-by-Step: How to do Alt + O C S on Mac Excel

Install the Fix: Download Accelerator Keys (14-day free trial, no credit card required).
Open the sheet: Open the sheet you want to change.
Press Option: Press the Option key. It works like Alt on Windows.
Press the letters one at a time: Press O, then C, then S.
Result: The Standard Width dialog opens. Type the width and click OK.

Frequently asked questions

Does Alt + O C S work natively on Mac Excel?

No. Excel for Mac’s own KeyTips do not support the legacy Alt + E, Alt + I, Alt + O, and Alt + D menu keys. Accelerator Keys adds them. Press Option, then O, then C, then S.

What is the modern equivalent of Alt + O C S?

The modern ribbon shortcut is Alt + H + O + D (Home > Format > Default Width). Both work on Mac with Accelerator Keys.