# Displaying movie properties and changing editable properties

The Debugger's Properties tab displays all the property values of any movie clip on the Stage. You can change a value and see its effect in the movie while it runs. Some movie clip properties are read-only and cannot be changed.

To display a movie clip's properties in the Debugger:

1. Select a movie clip from the display list.
2. Click the Properties tab in the Debugger.

To modify a property value:

Double-click the value and enter a new value.

The value cannot be an expression. For example, you can enter `50` or `"clearwater"` but you cannot enter `x + 50`. The value can be a string (any value surrounded by quotation marks), a number, or a Boolean value (`true` or `false`). You can't enter object or array values (for example, `{id: "rogue"}` or `[1, 2, 3]`) in the Debugger.

For more information, see String operators and Using operators to manipulate values in expressions.

Note: To write the value of an expression to the Output window in test mode, use the `trace` action. See Using the trace action.