Thanks ;) I have found it! For all users who do not know that function... you will find that in the "Item"-View under the Button "2" ("Link + Typography")!
Now when I want the unit symbol in the "Search Form"-View after the field... How can I do this? There ist no "Typography"-column. I want show the user that he does not have to enter the unit symbol in the search field. Because in this case the search doesn't work correctly.
Thank you for your help :)