How to find sharepoint list schema

The url to see any list schema is:

http://yourserveradress/_vti_bin/owssvr.dll?Cmd=ExportList&List={LISTGUID}

To have the list guid, go to the list page and click List Settings, look to the url and you will find the guid list as value of the 'list' querystring.

How to enable styles and markup styles in richtext field in List Sharepoint 2010

The styles are disabled because in sharepoint 2010 the styles and the markup styles menus are exclusive to wiki pages.

To fix this problem you will have to change your field in the schema.xml like this

<Field ID="{BF6BD5D0-F44A-4B62-99D7-A92A1465DFBF}"

         Name="RichtextMenuEnabled"

         DisplayName=" RichtextMenuEnabled "

         Type="HTML"

         RichText="TRUE"

         RichTextMode="ThemeHtml" />

and you will have the same field without having to delete/Create the list with the menu enabled

Hope that it helps if not please post a comment