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It may not be as simple as you want it to be. (That's my current motto for Croquet)
You might take a look at the code that handles the TZoomNavigatorMorph snapshots. The TZoomNavigator shows up in the Demo(Master) when you move your mouse near the bottom of the Croquet display. Snapshots allow you to "remember" different locations and later go directly back to them by picking them from the TZoomNavigator menu. Tracking this code a bit shows that the CroquetHarness>>#gotoSnapshot: method actually does the transporting, but is dependent on the properties of the snapshot already being in place, including having a postcard associated with the snapshot.
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