ISSUE SUMMARY:
How do i control the size of photos previewing in the activity stream? Right now theyre being shown fullsize. Seems like a preview size should be shown then click for fullsize version

STEPS TO REPLICATE:
1upload photo into activity stream
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RESULT
EXPECTED RESULT
BROWSER

Hi,

that because jomsocial always fit the photos into container size.
and GK msocial template not compatible with jomsocial 4.2.4
as you can see if stream item having more than 2 photos uploaded, the photos not inline. this is bug with GK msocial template.

please report the issue to them.

for more clear, please try to using joomla default template: Protostar
you can see the different of stream item that having more than 1 photo.

Regards