[Mouse Gesture] double click [Other mobile phones uses this] nokia n900, opera mobile [requires multitouch] no
z o o m i n
z o o m o u t
( s t e p l e s s ) z o o m i n u n t i l y o u s t o p t h e c i r c l e s
( s t e p l e s s ) z o o m o u t u n t i l y o u s t o p t h e c i r c l e s
p a n n i n g
z o o m i n a n d o u t
n o t p o s s i b l e