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Take the advanced editor panel (it's in the lower left corner for me), right-click on the frame, and in the context menu that appears, select "Select Tables" and check the "Creature" box in the list, then click "OK". Go to "Creature" in the dropdown list of the same panel. Select the desired creature in the tree below. The "MapPropertiesTree" panel (in the upper left corner for me) now contains information about this creature: you need to adjust it.