I have had a few occassions in which it would be helpful to be able to manipulate prefilters / look-up settings.
For example, I have a view which shows relationships of a selected relation. In the first column you have to select the kind of relationship, for example ‘employee’ or ‘competitor’. The second column is meant to select the relation. In this case, the relation look-up always shows all relations, which makes it possible to select a company as an employee and a person as a competitor.
This could be solved if there was a possibility to change the prefilters depending on the context.
Another possibility to solve this would be to be able to change look-up references: changing look-up table variant depending on the context.