Visibility conditionning by custom field

[CtrlMajSup]

We can give a value to a custom field according to the value of another one but is it possible to modify the configuration of this custom field?
Typically my problem is the following. I have a custom field that should only be displayed when another custom field has a certain value.
It can be managed with the custom view plugin but it will only edit the style and when we export in pdf we find the field hidden, hence my problem.