Preview size of the PDF files in the article would vary for browsers. However, you can configure the desired height and width of the PDF file.

Solution

  1. Go to the Settings () icon > Knowledge base site > Custom CSS & JavaScript, and Custom CSS tab is the default section.

  2. Paste the below CSS snippet in the window.

object {
height: 600px !important;
width: 900px !important;
}

  1. Update the desired height and weight as per your requirement.

  2. Click Save.
    1b_Screenshot_set_the_default_height_and_width_of_the_embedded_PDF.png

Outcome

2_Screenshot-outcome_set_of_height_&_width.png