Steps
Tap the Wall icon (4th icon) from right side toolbar.
Select from the Wall Drawing modes and tap on the canvas where you want the wall to begin and then follow the method defined above for the various modes.
Continuous Lines - Draws connected straight (only) segments in any direction without lifting your finger.
Continuous Lines & Arcs - Draws connected lines AND arcs in a single, continuous stroke.
Line / Arc - Creates one segment at a time. Simply lift and tap to begin your next line or arc.
Rectangle - Creates squares or rectangles by dragging from one corner to the opposite.
To customize wall thickness and color and other wall techniques go to Advanced Wall Drawing Options & Settings.