[Word] Quickly Center Equations and Right-Align Equation Numbers

Introduction
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When entering equations in Word, we often need to add a number on the right side of the equation, such as (1). However, manually typing spaces is time-consuming and error-prone. Today, I will introduce two methods that automatically center the equation while keeping the number fixed on the right.

Methods
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Method 1: Use `#(1)`
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This method is very simple:

In the menu above the equation, select LaTeX mode.
Enter #(1) at the end of the equation, then press Enter.

Note: When pressing Enter, make sure the cursor is behind #(1), otherwise the equation may display incorrectly.

Although this method is simple, it may sometimes be unstable, and the font of the number (1) cannot be adjusted.

Method 2: Set a Style
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Another method is to create a custom style. The steps are as follows:

Open the Styles panel Click the Home menu at the top of Word, and click the dropdown button in the Styles area.
Create a new style Choose Create a Style(S) and name it “Equation.”
Modify the style Find the newly created “Equation” style, right-click it, and choose Modify.
Adjust formatting Modify the font, paragraph, and other settings as needed.
Set equation centering and right-aligned numbering
- First confirm the paper size and page margins, which can be checked under Layout. The default is usually A4 paper (21 cm × 29.7 cm) with normal margins of 3.18 cm on both left and right.
- Calculate the positions:
  - Equation center position: $[(page width - left margin - right margin) / 2 = (21 - 3.18 - 3.18) / 2 = 7.32\text{ cm}]$
  - Right-aligned number position: $[page width - left margin - right margin = 21 - 3.18 - 3.18 = 14.64\text{ cm}]$
Set tab stops Go to Format > Tabs, then follow these steps:
- Enter 7.32 cm, select Center, and click “Set.”
- Enter 14.64 cm, select Right, click “Set,” and then click “OK.”
How to use it When entering an equation, first press Tab once, then enter the equation content. Press Tab again and enter the number.