[O] modifying header when in columns mode

[David Rees]

<Sorry if this is a double post. I sent it and approved it a couple days 
ago and it still doesn't seem to reflected in group.>

Is there a way to modify a header line in column view other than 
manually navigating to the field?

If I try to use a standard key like S-up I get:
"org-self-insert-command: Text is read-only: "Type `e' to edit property"".

If I try to eval org-priority I get:
org-priority: Text is read-only: "Type `e' to edit property"

Since column is editable, just in a different way, it feels like the 
APIs should still work. Failing that, is there another function I can 
use (so I can write my own wrapper that tries both)?

Thanks,
d