Alternatively, use File
>Templates
>Save as Templates
but it gets saved in one of the directories set at Tools
>Options
, LibreOffice
>Paths
(Templates line). By default it goes into the “internal” template directory which is usually hidden.
This is quick’n’dirty method. As far as your documents are expandable one-shot ones, not intended to be maintained and updated on the long run, this is good.
But, for reviewed and edited long-standing document, templates are usually also amended to improve formatting and layout. If you double-clicked on the template icon to create a new document, the relationship between the template and the document is lost as soon as it is created. Consequently, the document will not be automatically updated whenever the template changes.
For automatic update on template change, the template must be made known to Writer. This is done with File
>Templates
>Manage Templates
.