To set the default behavior of the Spotlight tool:
In the Preferences dialog, click Tools.
Select the Spotlight mode:
Magnifying glass: To magnify a specific image area.
Image filter glass (default): To apply a filter to a specific image area.
Click OK.
By default, Press spacebar to activate SmartFocus is shown on each workspace.
To show or hide it:
In the Preferences dialog, click Tools.
Select or deselect Show SmartFocus instruction text.
Click OK.