/text/shared/01/webhtml.xhp

Preview in Web Browser Creates a temporary copy of the current document in HTML format, opens the system default Web browser, and displays the HTML file in the Web browser.

The HTML formatted copy is written to the temporary files folder that you can select in %PRODUCTNAME - PreferencesTools - Options - %PRODUCTNAME - Paths. When you quit %PRODUCTNAME, the HTML file will be deleted. You can set the HTML export filter options by choosing %PRODUCTNAME - PreferencesTools - Options - Load/Save - HTML Compatibility.