I'm modifying the layout and content of the wordpress admin panel using a custom plugin. For most sections I have been able to change the page heading (i.e. the title wrapped in h2 tags at the top of each page), however I've been unable to do so for sections to relating post types, specifically adding and editing posts and pages.
Currently when adding a new page to the wordpress site, the heading is 'Add New Page', but I'd like to be able to modify this text - so far I've been searching for the hook to do this but have been unable to find one.