Minima theme portfolio lightbox images

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Hi
In the portfolio block I need to add 'previous' and 'next' arrows to the enlarged picture selected so visitors can navigate through all the portfolio pictures.
At the moment each picture has to closed down before another can be enlarged.
Thanks in advance.

 
theneptune replied on at Permalink Reply
theneptune
Will you use some addon for this.Which addon you are using for this?