I want to add an option under Create New to create a file of particular type. For example I use Rnote to create notes,. They have .rnote extension.

Now I create a empty file (image, 3rd option from above) with extension as  .rnote , but that file when opened in the application can’t be written to, because it is not a proper .rnote file, it is empty file with that extension.
How do I quickly create a proper file for rnote or any application for example libreoffice?
I am on fedora 43, kde plasma.


Since your question has already been answered, here’s a bonus:
Add a
Desktop Entryin~/.local/share/kio/servicemenus/to get right-click menu actions.e.g. to add to Dolphin (and Konqueror) right-click menu
What the %f means and what you might want to use instead