It's by design. However, in version 1.6.1 (possibly in older versions, too), you can change that limit behavior by putting the cursor immediately after the \sum symbol, and going to the "Edit -> Math -> change limit type" menu entry.
/************************************ Down with categorical imperative! flutz...@yahoo.com ************************************/ ________________________________ From: Vincent van Ravesteijn <v.f.vanraveste...@tudelft.nl> To: aivanov <aivanovm...@aol.com> Cc: lyx-users@lists.lyx.org Sent: Thursday, March 12, 2009 12:25:41 PM Subject: Re: Lyx and Sum symbol limits problem :( aivanov schreef: > Hello! > > I have problem with the 'Sum' symbol and the placing of its limits. I do > everything acording the User's Guide and it works only when the formula is > on a separate row and the sum is not part of fraction. > > See the screenshots -- think they describe what I want to say: > http://n2.nabble.com/file/n2469116/LyxSumProblem.jpeg > http://n2.nabble.com/file/n2469116/Screenpdfsumproblem.jpeg > I dont understand LaTex and am looking for a 'click-click' solution. > > Thank you! > > Alexander (from Bulgaria) > PS: Lyx 1.5.5 on Debian 5.0 and XFce. > Do you have a reason that you want the limits to be placed differently ? To me it looks very good this way and I would be happy and satisfied. Vincent