Creating objects

First, select the context you wish to create an object in by navigating to it with the tree in the left hand pane. Then, from the 'Object' menu, select 'New' and the sub-menu will give you the opportunity to create 9 different objects:
A Queue A queue represents a connection to a queue that resides on a WMQ queue manager.
A Topic A topic represents a connection to a topic managed by the message broker agent running on a queue manager.
A Queue Connection Factory This represents an initial connection to a queue manager.
A Topic Connection Factory This represents an initial connection to the message broker agent running on a queue manager.
A JMS Wrapped Queue Connection Factory This represents an initial connection to a queue manager. The connection will enlist the queue manager to the WebSphere transaction manager, allowing it to participate in a WebSphere managed global transaction.
A JMS Wrapped Topic Connection Factory This represents an initial connection to the message broker agent running on a queue manager. The connection will enlist the queue manager to the WebSphere transaction manager, allowing it to participate in a WebSphere managed global transaction.
An XA Queue Connection Factory This represents an initial connection to a queue manager. This connection allows participation in a global transaction but no automatic enlisting is performed.
An XA Topic Connection Factory This represents an initial connection to the message broker agent running on a queue manager. This connection allows participation in a global transaction but no automatic enlisting is performed.

Once you have selected the object to create you will be presented with the property dialog which you can set initial properties in. See here for more information.

Editing existing objects

Double-clicking an object (or right-clicking it and selecting 'Edit') will display the objects properties in a dialog. The properties can be modified and then saved by clicking the OK button. See here for more information.