To control which objects support rollover tooltips
- Click Tools
tab
Customization
panel User
Interface. 
At the command prompt,
enter cui. - In
the Customize User Interface Editor, Customize tab, in the Customizations
In <file name> pane, select
Rollover Tooltips.
- In
the Objects pane, click Edit Object Type List.
- In
the Edit Object Type List dialog box, select the object type you
want to display properties for on a rollover tooltip.
If an object type is checked, the properties for the object type are displayed on a rollover tooltip when the cursor hovers over an object of the same type. Clear the check mark next to an object type to remove support for the object type from rollover tooltips.
- Click OK.
- In the Customize User Interface Editor, click Apply.