Guillaume has provided a simple patch that uses align (instead of eqnarray) by default if amsmath is set to auto in the options. Thus, only if amsmath is explicitly set to never load will eqnarray be used.
The patch is here: http://www.lyx.org/trac/attachment/ticket/2543/0001-Use-AMS-align-instead-of-eqnarray-on-newline-insert-.patch I have tested the patch and it works well. Do we agree the change is desirable? If so, is it too late to change the documentation before sending to translators? Currently we have: In LyX multiline formulas are created by pressing Ctrl+Return inside a formula. This creates either an eqnarray environment that is described in [subsec:Eqnarray-Environment] or, when the option Use AMS math package in the document settings is selected, an align environment that is described in [subsec:Standard-align-Environment]. The align environment is recommended because it provides in any case a typographically correct output. It seems to me we need to update that paragraph anyways to reflect the new Math options dialog. Any thoughts? Scott
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