Иловакунии фрейм
Inserts a floating frame into the current document. Floating frames are used in HTML documents to display the contents of another file.
If you want to create HTML pages that use floating frames, choose LibreOffice - PreferencesTools - Options - Load/Save - HTML compatibility, and then select the "MS Internet Explorer" option. The floating frame is bounded by <IFRAME> and </IFRAME> tags.