You cannot add headings under another heading. Headings always appea on the same level.
If you would like to have levels of navigation, for example:
Test
Test-1
Test-11
Test-12
Test-2
Test-21
Test-22
This is what you have to do.
- Create a sub-site Test (from Site Actions > Create Site).
- Now navigate to the sub-site Test.
- Create another sub-site Test-1 (from Site Actions > Create Site).
- Now navigate to the sub-site Test-1.
- Create another sub-site Test-11 (from Site Actions > Create Site).
- Now navigate to Test. Click Site Actions > Site Settings > Navigation and set tje options as in the below screenshot.
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