View source for EN/documentation/ooo3 user guides/getting started/numbering equations

<section begin=title /><noinclude>{{DISPLAYTITLE:</noinclude>Numbering equations<noinclude>}}</noinclude><section end=title />

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Equation numbering is one of OOo Math's best hidden features. The steps are simple, but obscure:

# Start a new line.
# Type “fn" and then press ''F3''.
The “fn" is replaced by a numbered formula:

:<math>E=mc^2</math> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (2)

Now you can double-click on the formula to edit it. For example, here is the Riemann Zeta function:

:<math>\zeta (z) = \sum_{n=1}^\infin \frac{1}{n^z}</math> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (3)

You can reference an equation (“as shown in Equation (2)") with these steps:

# Choose '''Insert > Cross-reference''' from the menu bar.
# On the ''Cross-references'' tab, under ''Type'', select ''Text''.
# Under ''Selection'', select the equation number.
# Under ''Format'', select ''Reference''.
# Click '''Insert'''.

Done! If you later add more equations to the paper before the referenced equation, all the equations will automatically renumber and the cross-references will update.

: [[Image:Frame15.png]]

{{Documentation/Tip|To insert the equation number without parenthesis around it, choose ''Numbering'' under ''Format'' instead of ''Reference.''}}

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[[Category:Getting Started (Documentation)]]