This is our preferred file format for receiving files. But please bear in mind that a PDF is essentially a wrapper for content, so any poor quality images will stay poor quality in the PDF.
Some layout programs can produce PDF files directly and they are often a good way of doing so. Some programs allow “Save as PDF” directly. Alternatively special PDF drivers are available (some free - Primo, PDF reDirect - most commercial) which will convert any document into a PDF file. There are lots on online converting sites as well. Always check the PDF file with the original document. When making PDF files, please make sure all fonts are embedded. Also, if any content runs to the page edge, make sure a bleed value of 2mm or 3mm is used.
We use software which can change PDF files in all sorts of ways, but this is designed for last minute small changes. Larger changes are chargeable. Any substantial changes to a document are best made in the original program followed by a new PDF being made.
It is recommended not to have security passwords on PDF documents due to outputting problems that can occur.