Plot x axis can only be expanded to a certain level and then it automatically collapses
to a lower earlier level. There is no warning that no further expansion is possible. Also, it appears that the last expansion level varies even on the same plot. It should be possible to expand the plot such that less than 10 to 20 plot points are visible (just a thought).
Yes, this problem happens when zooming MOS switching process.
Update Qspice : 07/03/2025 Alleviated an issue zooming into tiny ranges of the abscissa.
I have submitted cases to Mike for review, and this update resolves the condition I set. If there is a simulation with a condition that could mistakenly trigger a zoom-out during zoom-in, consider uploading that schematic and plot config (before the last zoom action that triggered a zoom-out) to the forum.
However, it is expected that zooming in can only go up to a certain level and will no longer zoom further.