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I have two questions and I cannot find a solution up to now:

  1. I open a predifined template from thesis (i.e. chapter-1.lyx) and all the mathematical equations that I insert with Ctrl+Shift+M are aligned left. How can I have a centered alignment?

  2. In thesis.lyx, how can I add a new chapter? Only chapter1 and chapter2 are predefined but what to do if I want to insert another chapter3 from external file?

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On the very first line of the preamble where the document class is stated you will probably find "fleqno" in the straight options brackets. This option will left-align equations in the document. Remove this option to have your equations centre-aligned. – Waldheri Jun 13 '13 at 11:43
:( i don't see something like this to preamble! – amigo Jun 13 '13 at 11:47
As i see it uses only \userpackage{calc} – amigo Jun 13 '13 at 11:58
up vote 2 down vote accepted
  1. The thesis template that is included with LyX uses left-aligned equations by default, by having fleqn among the options to the document class. To fix this, go to Document --> Settings --> Document class, and remove fleqn from the Custom text box.

  2. Create a new .lyx file, similar to the existing one. You can for example make a copy of one of the first two chapter-files, and rename it to e.g. chapter-3.lyx. To include this new chapter in the same way as the first two,

    1. Insert --> Branch --> Insert new branch.

    2. Insert --> File --> Child document. Use Include as Include Type, and choose your new chapter file, chapter-3.lyx.

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It doesn't let me to remove it, but i change it to fceqn and is ok now – amigo Jun 13 '13 at 17:27

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