To override the general properties for all object types that 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 Properties pane, select the check boxes next to the general
properties you want rollover tooltips to display for all object
types.
- Click
Reset Overrides.
- Click Apply.