View the data in a large graph by more easily shifting ranges and scales
A common task is to scan a large x-y graph for interesting changes in y. I now do this by manually changing the axis limits. This is tedious when a function shows many interesting regions and many scales of variation. The problem is akin to panning and zooming a photo. Excel should have the equivalent functionality when looking at plots of numbers. To a degree, this functionality is already there with View>Zoom, but this is simply a graphical zoom, roughly equivalent to a "digital" zoom on a camera. Better to have an "optical" zoom, with panning by dragging the mouse. Unlike a photo, however, a user would typically want to zoom or pan in the x, y, or other dimensions independently -- pan x, zoom y, etc.