Render ALIGN grid data

Loading the ALIGN grid data in Pintura seems to work but I noticed the following issues in descending priority:

At first, the grid is not visible because it is outside of the view. Maybe, we should call the function that is executed with space bar upon loading the grid immediately?

Is the distance by which I move the view with the arrow keys depending on the zoom factor or a fixed number of pixels?

This model is larger than the previous examples and scrolling could be improved. It seems to that when I move with the arrow keys, the view is lagging behind.

The model is so large that when you zoom out to view everything, the grid looks very fine grained and the numbers are too small to read. Maybe we could make the grid more coarse when zooming out?

Moving the view by dragging with the mouse + right / middle mouse button would be more convenient but I guess there is the reason that we do not have this already. Would it be a lot of effort to implement?