presets: pen size 10, how fast 1.72, change x 0.00 pen size 3, how fast: 1.33, change x 0.00 pen size 10, how fast 1.71, change x 0.83 pen size 10, how fast 1.71, change x 0.70 pen size 10, how fast 1.71, change x 0.71 pen size 5.41, how fast 1.71, change x 0.4 pen size 10, how fast 1.73, change x 1
