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Numbering Equations

One WordTips reader expressed a desire to number the various equations appearing in his document. The desire was to have the equation be centered on the page, and the equation's number appear at the right margin within brackets. When a new equation is added to the document, the subsequent equations should be renumbered.

There are a number of ways you can approach this problem, but the possible solutions can be broken down into two general methods. The first method accomplishes the numbering using a combination of tables and fields, and the second uses tabs and fields. If you want to use the table approach, you can do so as follows:

  1. At the point where you wish to insert an equation, create a table with one row and three columns. Make the right column just wide enough to contain the number style you wish to use (for numbering the equation). Make the left-hand column the same width in order to balance the space left for the equation number. Format the table so its borders are not visible.
  2. In the center column type your equation, using Equation Editor.
  3. With the insertion point still located in the center column of your table, click on the Center tool on the formatting toolbar. This centers the equation in the column. (If you made your left and right columns the same width, as pointed out in step 1, then this also results in the equation being centered on the page.)
  4. Position the insertion point in the right-hand column, then click on the Align Right tool on the formatting toolbar.
  5. Type the left bracket that you want to appear around the equation number.
  6. Choose Field from the Insert menu. Word displays the Field dialog box.
  7. In the Categories list, choose Numbering. (See Figure 1.)
  8. Figure 1. The Field dialog box.

  9. In the Field Names list, choose Seq. The letters SEQ should appear in the Field Codes box at the bottom of the dialog box.
  10. Click on the Field Codes box and make sure the insertion pointer appears at the end of the field.
  11. Type a name for this sequence of numbers, such as Equation.
  12. Click on OK. A number appears in your document at the right of your bracket.
  13. Type the right bracket to finish out the equation number.

If you want to use tabs to accomplish the same task, you can easily do that, as well. For instance, let's say you are using 8.5 x 11 paper, with 1-inch left and right margins. In this case, you would follow these steps:

  1. Position the insertion point where you want to insert the equation, then choose Tabs from the Format menu. Word displays the Tabs dialog box. (See Figure 2.)
  2. Figure 2. The Tabs dialog box.

  3. If there are any existing tabs in the paragraph, click on Clear All.
  4. In the Tab Stop Position box, type the position of the first tab (3.25).
  5. For an Alignment, select Center.
  6. Click on Set.
  7. In the Tab Stop Position box, type the position of the second tab (6.5).
  8. For an Alignment, select Right.
  9. Click on Set.
  10. Click on OK to close the Tabs dialog box.
  11. Press Tab to advance to the first (centered) tab stop, and insert your equation.
  12. Press Tab to advance to the second (right-justified) tab stop.
  13. Type the left bracket that you want to appear around the equation number.
  14. Choose Field from the Insert menu. Word displays the Field dialog box.
  15. In the Categories list, choose Numbering.
  16. In the Field Names list, choose Seq. The letters SEQ should appear in the Field Codes box at the bottom of the dialog box.
  17. Click on the Field Codes box and make sure the insertion pointer appears at the end of the field.
  18. Type a name for this sequence of numbers, such as Equation.
  19. Click on OK. A number appears in your document at the right of your bracket.
  20. Type the right bracket to finish out the equation number.

The advantage of using the tab method (as just described) is that you can define a paragraph style that already has the two tab stops set. You can then format any paragraph with the style, and simply type your information. You can take it one step further and also save the brackets and sequence field as an AutoText entry. In this way you could very quickly enter your sequence numbers.

When you add new equations in the middle of your document, it is very possible that not all of your subsequent equations will automatically increment. If you want to make sure that all the sequence numbers are correct, you can select the entire document and press F9 to update the fields.

WordTips is your source for cost-effective Microsoft Word training. (Microsoft Word is the most popular word processing software in the world.) This tip (273) applies to Microsoft Word 97, 2000, 2002, and 2003.

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Comments for this tip:

Jean Claude Le Roy    04 Apr 2014, 14:00
It's work well under WORD 2013 with
a small matching with the new GUI.

One issue I have more hundred equations in my doc, maybe this method is the little bit long. I will try for the first tewnty formula

Sent from France
Erk    22 Dec 2013, 09:20
The tab approach has a problem: since the equation will be automatically formatted as "inline" - but what you want for numbered equations is "display" formatting (slightly larger, better size ratios, ...); for nontrivial equations the result is not acceptable.

Word 2013 does still not allow any other character in the same line as a "display" equation, not even a tab!

The table approach is a heck around this.
Jinto James    01 May 2013, 14:53
Thank you. you saved my day
D    28 Mar 2013, 15:55
Joe,
  To cross-reference, first highlight the equation number, Insert|Bookmark from the ribbon/menu, and give the bookmark a name. Then, to actually create the cross-reference, Insert|Cross Reference, choose Bookmarks in the dropdown menu, and select the bookmark. There is another dropdown menu that gives you options on what actually gets printed.
Joe    27 Feb 2013, 11:59
Hey, this is very useful, thanks.

But how can i cross-reference the equation using this new field code?

I've tried using NoteRef, and the manual field codes i've put in for each equation don't show up...
farshid    27 Feb 2013, 04:49
tnx
Martin    18 Jul 2012, 10:35
This was very helpful! Thanks a lot! It might even make me switch from TeX publishing to Word, now that a useful equation editor is available.

With "Click on the Field Codes box and make sure the insertion pointer appears at the end of the field." the Author meant you should click in the text enty field where "SEQ" appears, then write "Equation" behind it.

One may even reference to the equation numbers. Do so by selecting one with the mouse cursor (including the brackets if you want) then click Insert->Bookmark, give the equation a name. Now to add a reference Click Insert->Cross Reference and select the new bookmark. Works fine for me.
Dima    16 Jun 2012, 10:48
it's not clear at all.. you should do it with pictures...
I dont understand this sentence:
Click on the Field Codes box and make sure the insertion pointer appears at the end of the field.

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