Fully resizable split area for zoom
|zoom, split, limitations
When using the zoom feature, the size you can give the two different areas of the split work area is under some in non-obvious, not particularly helpful restrictions.
It seems to be based on some percentage of current program window size.
I agree some restrictions are a good idea, mainly so that the split bar never reaches the edges of the work area, but currently the limitations on this feel very arbitrary, the user should have a larger margin to resize the split.
TL;DR: zoomed out half can't be made narrow enough.