Watchlist csv import

I’ve created a Watchlist folder and imported a csv with securities. The imported securities do not land in the Watchlist. It seems I can only add a single security manually. Is my observation correct? If not, how do upload a bulk securities in the Watchlist?

Create a single security. Export the same from the all securities screen. Add your new securities in the same pattern as the exported one.
Finally import them into All Securities and drag and dropnthem into your watchlist.

Draging helps. I now have beautifull watchlist for GER, NLD, USA. Thank you!