Set Size Print Area

hello guys, anyone know how to set size paper to A5 ?

Hello,

In the Print Settings, you can set PDF Page size as A4 or Letter. Please check if Letter works for you.

If needed, you can also create a custom Print Format in HTML and defined required width.

you mean i edited the format from inspect elemen ?

If A4 or Letter, does not work for you then you could have a look at the following link to create custom print format