As designed Can only view 1 image in lightbox with full size images

It was done like this deliberately and it is different to the behaviour in XF1.

I can’t recall the precise reasons, but certainly a suggestion would be better at this stage.
 
Thanks, I clearly recall it working differently at some point, but didn't recall when it started behaving this way. 2.0 sounds about right. I'll submit a suggestion.
 
Note: this is somewhat contrary to the setting description which seems to suggest lightbox will display all images per page or per message:

1537052176430.webp

As it is, regardless of this setting lightbox only shows 1 image (vs. all for page all for message). This setting only applies to Thumbnails as currently implemented. Perhaps some clarification in the setting description is needed.
 
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