Adding a little attention.
Adding a hover effect to ButtonPlus is as simple a clicking the blue add child button, choosing the effect and styling it as you want.
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Add a hover effects child.
Choose your desired effect.
Setup the colors and optional settings.
Not all the effects will use all the options available.
Transition time is available where appropriate. Some effects have present timings and transition times.
Click the add child button in ButtonBar or ButtonGroup and you can instantly add the same hover effect to all of the buttons. This is a great timesaver and how the underline effects on this site menu were achieved.