The phrase "to make a gesture" means to do or say something small to show a particular feeling or intention. It can be a simple action or a kind word that helps express a message or emotion. Full definition
At the age of 1 month, the babies usually start making the gesture of lifting head (though most attempts are unsuccessful until the baby is 2 month old). (newkidscenter.com)
The singing of the song, the performance of it, is the same as making a gesture with paint, in that it expresses how the artist feels while representing something. (hamptonsarthub.com)
Users can also click a selfie by making a gesture with their palm, which is pretty convenient. (killerfeatures.com)