Zoom and Ruler Boundaries. Padding

It would be more useful to have a little bit of padding of the work zone with the ruler when zooming to do fine work.
Depending on the size of the display, while you use 100%, you have some space of padding

you have padding to work out of the boundaries.

If zoom increments,

There is no padding, and the scroll does not work to move out of the boundaries of 0,0

Try expanding the height of the work zone.