It means dexterous hands. Paul Clay is dexterous with both hands. He writes with his right hand and draws with his left. That is to say, he drew his wat(wat with one hand (wat should be a clerical error, I don't know what it is), and the title and signature used the other hand. This ability can last forever, which must be attributed to his talent for playing the violin. Between 192 1 and 193 1, Kelly worked as a teacher in the School of Modern Art and Design of Bauhaus University. There is a story that when he started teaching the first class, his eyes didn't contact with his students. He went straight to the blackboard and drew two arcs with a piece of chalk in each hand. As a result, he magically synthesized a fish.

Paul klee is a German painter of Swiss origin.