Vertical labels too close

[zxteloiv]

When ploting values which may be some small floats, vertical axis is always starting from 0, and interval on that axis is small, leading the labels are mixed together.
In my case, I plot these float values sequentially:
0.0567 0.0537 0.056 0.0591 0.0571 0.0581 0.0575 0.0562

It will be pretty good if there's an option to set whether the vertical axis needs to start from 0.