When I magnify plotting area in Qt terminal, it seems that there are two processes competing:
- Qt tries to center the plot (and move upper left corner towards down and right)
- gnuplot replots it to make it bigger
The first effect usually happens if something is configured to be centered (as opposed to be attached to left & top border). This is indeed very useful when replotting is switched off, so that even if one resizes the plot in one direction, it stays nicely centered. But when auto resize is off, the effect is somewhat annoying.
This is a low priority, and might be easy to fix (just one or two settings of how the plot is placed on canvas).
I have some problems explaining the problem without sending a video.