There are a large number of global predefined variables that you can use to insert items that you may want to change, for example the title of the project, the copyright note, the date and time in various formats and the date and time at which the current topic was last edited.
Some of the predefined variables have automatic values, others take their values from the Configuration section of your project. See Global predefined variables for a list of the available variables, what they do and where they get their values.
Variables and Conditional Output (Reference)
Global predefined variables (Reference with list of variables)