how to modify queue in broker

There is a statement in regarding broker “You must lock a queue before you can edit the contents of the queue”. can we view the contents of broker in webMethods?
if yes, how to view it/modify it?

Hi,

viewing is always possible via MWS Messaging UI.

Modifying the Queue requires it to be locked.
This can be done in MWS Messaging UI as well.

See Broker Administrators/Users Guide for details.

Regards,
Holger