The y-axis scale is not changing

[#1]

Hello! I am working on JMP 17 and trying to graph this data set, with the timepoints (months) on the x-axis and the pH results on the y-axis. I did the overlay as "batch". I was able to graph it, however, when I try to edit the y-axis to make the scale from 5-6 and increments of 0.5, nothing happens. I am assuming it has to be with the value and label thing, but how do I make it so its standard scale 5-6 on y-axis? 

[#2 · Accepted solution]

Change the pH column to numeric and it will work.  Double click on the pH column header and change character to numeric/continuous:

Old:

New:

[#3]

It worked, thank you very much!