"Alba adds a Landscape/Portrait item to the Insert menu. When
you select the item, you are presented with four choices: To change
the orientation of the current section or the next page, to create
a single page in the document that is oriented differently from the
others, or to modify the current page style based on the formatting
of the page you are on. Where necessary, the dialog changes to fit
the circumstance, so that if you are on a Portrait Page, it offers
to change the next page to Landscape, and vice versa.
"Alba works with Writer's existing page style system to achieve
its effects. For instance, if you are manually formatting, if you
apply one of Alba's options, you will create a modified version of
the Default style called L_Alba or Default R_Alba. If you are using
another page style, such as First Page, then Alba creates a
modified version of it with a similar name."