Problem

Editing the PDF Stylesheet and trying to export a single page  via Tools > Export to PDF does not apply the stylesheet settings. This issue may not be noted after 6.13.x versions.

As an example, noted in this BUG:   CONF-26230 - Getting issue details... STATUS

The Workaround notes adding the following CSS in Confluence Admin > PDF Stylesheet to edit the vertical vs horizontal.

body, p, li, td, table, tr, .bodytext, .stepfield {
    word-wrap: normal;
}

.wiki-content p {
    word-wrap: normal;
}

Cause

The main issue is that you can customize the Stylesheet but even so that PDF customization only applies to space exports not single page exports via Tools > Export to PDF.

Workaround

For the workaround, export a single page:

• Edit your stylesheet
• Go to:
  • Space Tools
  • Content Tools
  • Export
• Select 
  • PDF
  • Custom Export
• Choose only the single page you want exported

• Export