Drag the 'Testimonial Card Hover Box' widget from the Library Panel (Window > Library) and place onto your Adobe Muse website. Within widget options, add an image, style the effect and text, and done!
Using the widget - Initial Steps
In the examples below, each Hover Box has different background and border color, text alignment, and hover speed, and thus, a unique instance number.
Add multiple instances on one page
Set the image to be Responsive
Add a 'Testimonial' with 'Author' name
All about linking
What's in the 'Effect' section
In 'Effect' section within hover box widget options, there are 2 sub-sections. Here you can: