Modifying Object Attributes Using the Properties Window

Select the object for which you want to edit its attributes by clicking it in the view window or clicking its name in the history tree.
Under the Attribute tab in the Properties window, edit the object attribute.

Depending on the attribute type, you can edit it by doing one of the following:

Select the check box to apply the attribute; clear the check box to disable the attribute.
Click in the field and edit the numeric values or text, and then press Enter.
Click the button and then edit the current settings in the window or dialog box that appears.
Click the Value column of the attribute, and then select a new setting from the menu that appears.