- Open any document in Preview app (e.g. any PDF file).
- From system top menu, choose:
File > Print...
- From print dialogue, choose
Page Size
>Manage Custom Sizes
. - Add new profile with the following values:
- Width:
209,9
- Height:
297,04
- Margins:
User Defined
- Top, Bottom, Left, Right:
0
- Set profile as a default:
System Settings
>Printers & Scanners
>Default paper size