Note: This feature is available for Designer Pro+ from version 20.5 onwards. Formerly these options were referred as 'Supersites'. For Designer Pro X users, you can find more information here.
You can find these options by going to Utilities > Web Properties > Export
The Export tab lets you control how your website or document will display after publishing, whether as one long scrolling page, as individual pages with a transition effect when navigating through them or scaled to fit the width of your browser.
Technical note: Any other option other than 'Website' will combine all pages into one file, and then use anchors to navigate through the pages. This is needed to achieve the transition effects. This is not suitable for large or complex websites as it will take a long time to load for those on slower connections.
Under the transition effect dropdown, select the Website option to export as a conventional website (all pages are individual html pages).
For one long continuous document, select Scroll and then either Vertical or Horizontal in the transition direction (this used to be known as vertical or horizontal supersites).
Select any other affect to show an animation between the pages, with the exception of Instant. This will export your website
Print and Presentation Documents
If your document is set as either a print or presentation, then the website option is unavailable, however you can still export with Instant if you don't want any transition animation between your pages.
Individual Page Transitions.
If you want to set the transition effect for each page individually, you can do so under the Page tab of the Web Properties Dialog:
Scale to fit width
Scale to fit width: Maximum
Select this option to scale your whole website to fit the width, up until the maximum value set. For example, if you set the value to 1600px, and your website is 1100px wide, it to scale up until it reaches the value.
Scale to fit screen
This option will scale your whole page up or down to fit within your browser's window size. This is suitable for presentation and landscape documents, as it will scale both height and width of your site (rather than the former option which just scales the width).
This lets you add various UI elements to your website or document
Adds a navigation bar at the bottom with page previews, as well as zoom controls.
Adds a button at the top right that allows to to download the document as a PDF.
Adds a Xara logo at the top left.
Please note that the above options are disabled if the Website option is selected in the dropdown