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Tips related to equation numbering
This page is for tips on how to number (or not number) equations in LyX and LaTeX.
To change the label of a equation put your cursor in the very equation and insert a label (Insert > Label). The old label will be shown in the dialog and can be edited.
The first clicking changes the equation to an inline formula and deletes the equation label at the same time. The seconding clicking changes the equation back to the display mode. Using the keyboard, press Ctrl+Shift+M twice.
And another way:
An option to automatically number all equations entered in display mode is on the developer "wish list". Meanwhile, two work-arounds have been suggested:
in the document preamble; or
If you want all equations numbered by default in new documents, you might use option (a) in a template file.
To achieve this add the following line to your document preamble:
respectively. But it requires amsmath, so make sure that "Use AMS math package" is selected in Document→Settings→Math Options