I wanted to just allow a single “Heading” paragraph format in CKEditor, rather than having multiple heading options. I found that it was possible to change the available options in editing “config.format_tags” in ckeditor/config.js. For example, the following would show just the paragraph (Normal) and h1 (Heading 1) format options:
config.format_tags = 'p;h1';
However, having “Heading 1” as the only heading option isn’t particularly satisfactory, so I wanted to rename it to something else. This requires defining a custom format type, as follows:
config.format_tags = 'p;Heading';
config.format_Heading = { element : 'h1', name: 'Heading' };
Each of the format_tags needs a corresponding format_(tagName) entry and the default ones are predefined (http://docs.ckeditor.com/source/plugin28.html#CKEDITOR-config-cfg-format_tags). Overwrite these defaults in the config.js file does not seem to work, so I had to define a new format type, ‘Heading’, using the h1 element and named ‘Heading’.