This is the all-purpose tool for working with TypoScript. You can get to it via Web | Template and the drop-down list on the top. It has several uses, and we will now look at these uses. (You have already seen some of them.)
It is not possible to create a new template for a page that already has a template, but it is possible to edit the existing template. You can either edit the entire dataset (Click here to edit whole template record) or edit individual fields. To do the latter, click on the pencil icon next to the relevant field.
The Info | Modify tool has a number of fields, which we will describe briefly.
This field allows you to assign the template title. This title is only relevant to you and to the internal processes in TYPO3 since it is not displayed in the front end. Assigning titles is very useful when several templates are being used, but it is recommended in general as it makes things much clearer.