How to Use your PDF presets for Photoshop.

Create a page with 3mm extra for bleed. ie A4 = 216x303mm. Ensure it is CMYK (you can create and work in RGB but please convert to CMYK when completed) and 300ppi.

it’s useful to create guides for where the crop marks would be and also for your exclusion margins

When you have finished your page you can save it as a PDF using your presets.

To give us flexibility then PSD is best (please convert any text to vector or supply the fonts)