In his review of the exhibition, Miloš Macourek praised Pitra's "keen-edged wit and political involvement" and expressed the conviction that the author would no doubt soon establish himself in the broad field of practical graphic art as well. He was not wrong in this prediction. After completing school, Pitra began to work as a graphic designer for domestic and international trade fairs; among other things, he participated in the graphic design for the Czechoslovak pavilion at the EXPO 58 World's Fair in Brussels. Much like his schoolmate Ladislav Rada, he also designed advertisements, posters and record covers for Gramofonové závody – Supraphon.