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Egal, ob Bewerbungsgespräch, neue Bekanntschaft oder Spontantalk in der U-Bahn: Ob wir jemanden sympathisch finden oder nicht, hängt nur zu etwa 5 % vom Inhalt des Gesagten ab.
(Appears as a heading in a section about body language)
Explanation: There is no literal translation from 'Zeichen setzen' into english. I would focus on the message itself (about body language) and highten it, so there is no doubt what you are meaning. luck. ;)