Is the override function available for manual journals?

Summary

We are able to use the "override" function for tax journals but not manual, can anyone use it for manual journals?

Content

The override function allows us to change entity, account, cost centre - anything in our accounting string - in a simple screen and then Oracle ERP posts a full journal to reflect the minor change. We would like to be able to do this with manual journals too but currently don't appear to have the option. I am wondering if it is our settings preventing us from doing that or if it is because the system does not have that ability. Does anyone else have the ability to use the "override" function on a manual journal?