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I used this HTML for a group of 5 pictures:
But no result: user interface elements keep appearing at the outside of the window and the thumbnails are still appearing horizontally
Those options are only available in Fresco Pro.
I have Fresco Pro
data-fresco-group-options:"thumbnails: 'vertical', ui: 'inside'"
data-fresco-group-options="thumbnails: 'vertical', ui: 'inside'"
OMG! It works. Thanks for the help