In the Navigation window in version 0.61.09 I can use the slider at the botton of the window to ZOOM into or out from a picture. In the ROOT window of Synfig there are four (4) buttons to adjust the ZOOM.
PANNING is a fundamental and very important function and yet there are no hot keys to perform PANNING in neither the Navigator window nor the ROOT window of Synfig.
The only way to adjust panning is using gross (estimated) mouse movements by moving the red box around in the Navigation Window using the mouse to drag the Pan to an approximate position. There is no such ability in the ROOT window.
PANNING is a fundamental function and as important as ZOOM. Please consider adding this important feature as soon as possible to the Navigation window and to the main ROOT window.