Move Selection to New File
You can easily move a code fragment to a separate new file.
Select a block of code and press Ctrl+1, select Move selection to new file… from the list of quick assist proposals and press Enter.

Fill in the name of the new file.

Note
The initial selection is replaced by an `include to the new file

Tip
You can also Right-Click in the editor and go to Refactor > Move Selection to New File.
