Du musst fuer die Seiten auf denen du das Querformat haben moechtest die Seiten drehen. Wie das geht findest siehst du im nachfolgenden Text (ich habe leider nur die Englische Version):
Manually Defined Range of a Page style
The “Default” page style does not set a different “next style” on the Format - Page - Organizer tab page. Instead, the “next style” is set also to be “Default”. All page styles that are followed by the same page style can span multiple pages. The lower and upper borders of the page style range are defined by “page breaks with style”. All the pages between any two “page breaks with style” use the same page style.
You can insert a “page break with style” directly at the cursor position. Alternatively, you can apply the “page break with style” property to a paragraph or to a paragraph style.
Perform any one of the following commands:
To insert a “page break with style” at the cursor position, choose Insert - Manual Break, select a Style name from the listbox, and click OK.
To apply the “page break with style” property to the current paragraph, choose Format - Paragraph - Text Flow. In the Breaks area, activate Enable and With Page Style. Select a page style name from the listbox.
To apply the “page break with style” property to the current paragraph style, right-click the current paragraph. Choose Edit Paragraph Style from the context menu. Click the Text Flow tab. In the Breaks area, activate Enable and With Page Style. Select a page style name from the listbox.
To apply the “page break with style” property to an arbitrary paragraph style, choose Format - Styles and Formatting. Click the Paragraph Styles icon. Right-click the name of the paragraph style you want to modify and choose Modify. Click the Text Flow tab. In the Breaks area, activate Enable and With Page Style. Select a page style name from the listbox.
Die deutsche Version findest du in deiner deutschspraching Version im Help File unter (wahrscheinlich) “Orientierung von Seiten”. Der “page break with style” ist wichtig!!!