In Word select File, Page Setup:
- Settings – Page Attributes
- Format for – Any Printer
- Click Paper Size – click Manage Custom Sizes
Custom Page Size:
- Click + to add new size – name it PDF borderless
- Click in the paper size boxes to make 210mm x 297mm for A4
- Make sure Non-Printable Area says User Defined, and change margins in boxes zero
- Click OK
Go to Print menu:
- Click on PDF – Save as PDF
- Choose file name and save location
- Click Save