I'm using TYPO3 (using ver: 6.2.11) and I want to do the exact thing as mentioned in: Rename the subheading in backend. The problem is that I simply could not find navigation link to reach the specified destination page settings » resources » TypoScript Configuration » Page TSConfig. Either it is not showing or I am not at a right start page.
You need to edit properties of the page like shown on below screenshot, if this tab/field is unavailable for you that means, you haven't proper permissions and need to ask to do this change the full admin.