Can a content type have default input in fields Is there a way for a user to add new content and have some of the fields already pre populated with default text/input.

That way the user can amend what changes are required for a node without having to copy and paste what will be very similar details into the add content screen node/add/[content type]?

Hope that makes sense.
Yes almost all fields have a section to add default content.
Go to "Structure" > "Content Types" > Your content type > "Manage Fields" then select edit on the field that you want to add the default text to