Helpo de LibreOffice 25.2
Elektu je Dosiero - Konservi kiel. Vi vidos la dialogon Konservi kiel.
In the Save as type or File type list box, select the desired format.
Enter a name in the File name box and click Save.
If you want the file dialogs to offer another file format as default, select that format in - Load/Save - General in the Default file format area.