Tweak PDF lets you set the initial view preferences of a PDF document, such as whether to center window of the PDF file when opened, whether to display document title, to fit window, to hide menu bar, to hide toolbar, and to hide window UI. You can also set the page mode of a PDF document, such as show PDF files in full screen mode, outlines mode, thumbnail mode, or simply without any special mode. In addition, PDF document properties such as title, subject, author, keywords etc. can be modified.

Note: The latest version is no longer freeware – now includes a 500k file limit. As such, I have made the last free version (v1.33) available for direct download.