In MS word 2010, I have set multilevel heading. but my heading style does not follows by previous style. For example Heading 1 is 5. after thet when I select heading 2, it should be 5.1, but it displays 1.1. Can anyone help me to solve it. Thanks.
Try right clicking on the list numbering of the heading 2 paragraph and choose "Continue Numbering".
Yes, the problem is once you change anything inside this dialog all other formattings will break (though they may seem intact).
What you have to do is make sure the correct preset in the dialogue attached is activated (that is the "1 Überschrift, 1.1 Überschrift", see picture). Afterwards right click the "heading 1" style set "select all", then click on the style set again . This will update the "new" style set 1 to all headings that were previously styleset heading1. Repeat with heading 2,3,etc. After that your multilevel heading will be repaired.
Okay, it looks like heading2 is not connected to heading1.
Now delete the 1. that stands there (in my case its 2.) and then reapply the numbering by choosing the first entry in the dropdown menu