Frequently asked questions - Writer
How do I insert a non breaking hyphen when the process indicated in the help doesn't seem to work?
The Help indicates that you obtain a non breaking hyphen by the Ctrl+Shift+- key combination, the - being the one from the numeric keypad.
On some systems, it appears that this key combination does not work directly. To workaround this issue, the numeric key pad has to be unactivated.
Another solution consists of selecting the▸ ▸ menu.