Viking GPS editor/viewer: how to scroll the map while entering points in a track?

I just discovered the (great) Viking application for editing and viewing GPS tracks. I am struggling to find a way to scroll the map while I am editing?adding points to a track or a route, like in the following case: I know I can click on the "four arrow" symbol and then move the map, but this will exit the track editing mode --- I have to select "extend track" to continue each time. I am sure there should be a better method, but I am unable to find it. Is there a way to scroll the map while in track editing mode?