I would like to pass a variable to a macro when creating a page to configure this automatically

[James Deguara]

For example I use a page tree to give structure to the pages created for each project. When the project manager has a new project to create (s)he simply copies the Parent page and all child pages are created automatically in the correct structure. The problem is that some of the child pages contain macros that we then need to manually amend so they only reference information / pages within the projects and not all projects. I would like to pass a variable (e.g. $ProjectName ) to update the macro at creation so the macro is automatically limited to information relevant to the project. 

i.e. see screenshot. I want to replace ProjectName with a variable in the "With title" parameter.