You can easily define a dictionary and then inspect it. For example, type the expression below and then evaluate it using the Inspect option on the Edit menu.
(Dictionary new) at: #name1 put: 'John'; at: #name2 put: 'Nancy'; at: #number put: 20; at: #date put: (Date today); yourself.
The expression creates a dictionary and adds a list of objects to
it.
As with a regular Inspector window, you can change the values for keys simply by replacing them with different values. Changing variables shows how to change values in an inspector.