Changing text in a formatter template, you must be aware that some text is used to create links, so it can not always be changed arbitrarily without breaking the links. This mostly concerns text used for topic titles. Some blocks are interdependent in the sense that changing a block you must change its dependent blocks correspondingly, to avoid breaking links. Some (not many) blocks can only be changed if you make corresponding changes in the scripts in the Doc-To-Help project. For example, if you change title “MyProperty Property” to “MyProperty (property)”, then links for MyProperty in the text will be broken, because the scripts in the Doc-To-Help project assume a property topic title has a certain format.
For the complete list of rules and restrictions in changing formatter template text, with complete lists of dependent blocks, see Documenter\Customization\Restrictions.doc in the Doc-To-Help installation directory.