I've set a master security setting to allow some things but not others
The problem is that every time I open the document, I have to retype it in to let me do the things I want.
I want to be able to copy parts of the pdf file every time but not be able to edit it?
When setting the security on the document, please ensure that the "Copying/extracting Content" checkbox is checked on the Document Security dialog and all other checkboxes are unchecked before you press the OK button.
This will then allow you to copy text from the document and extract content from it, but will not allow you to edit the document.