Meinst du die VI Description?
Hierzu steht in der Hilfe:
Zitat:VI description—Contains the text that appears in the Context Help window if you move the cursor over the VI icon.
Use <B> and </B> tags around any text in the description you want to format as bold. You also can use the VI Description property to edit the VI description programmatically.
Note If you do not provide a VI description for a dynamic child member VI in a LabVIEW class, LabVIEW displays the description for the nearest ancestor class dynamic member VI of the same name, if available.
Es ist also als einzige Tag "Bold" erwähnt.
Ich meine, dazu gibt einen Feature-Wunsch im LabVIEW Idea Exchange...
Gruß, Jens