I would like my document to have the basic heading styling for Heading 1 and Heading 2 but for Heading 3 to be numbered. I can get close by defining my own modified multilevel list style but it introduces a tab at the start of each Heading 1 that I cannot remove and also numbers the Heading 3s as if the super-headings had been numbered (e.g. 1.1.2).
How do I set up the style of a Word 2013 document so that Heading 3 is numbered but Heading 1 and Heading 2 are left untouched?