Fixed dashboard width and unixtime on x-axis

I’m using the SVG Snap plugin to show a map with values on it. All good and well, but the panel does not seem to scale well. When viewing the dashboard on a smaller screen, part of the SVG is overlapped by the graphs next to it.

The map becomes hard to read when made smaller, so I figure the most user friendly way to solve the problem is to set a fixed dashboard width. Is this possible? It would ensure that the values can always be read and the entire map staying in view.

A second question I have is about the x-axis. Is it possible to show the unixtime as a number instead of a regular datetime (e.g. 2020/10/04 and 12:13:00)?