The "Polyline" drawing tool allows you to easily draw clean polylines by letting you manipulate the passing points of a line.
Tap ①Stabilizer and tap ②Polyline in the “Drawing tool”.
Tap the canvas to place a passing point that becomes ①Start point . After that, tap continuously to place multiple passing points.
Drag the ①Line to move the whole image.
Drag the ① Line with two fingers to zoom or rotate.
After dragging ①Passing point to adjust the shape ,tap ②✓button .