[Elenna]

Looking at the code from the Photopost add-on: https://vborg.vbsupport.ru/showthread.php?t=139202 I found a way to use BBCodes to show the thumbnail. I just need to figure out how to modify the existing [ img ] tags.

Here are my settings for the BBCode. Note: This is very rudamentary. Customize to your liking. I'll keep searching to see how I can modify the existing [ img ] tag with this.

In AdminCP>Custom BB Codes> BBCode Manager, scroll to bottom and click Add New.

Title: (whatever you want)
Tag: (whatever you want - to test, I'm using 'image')
Replacement:

<a href="{param}"  class="highslide" onclick="return hs.expand(this,{slideshowGroup:'$post[postid]'})" target="_blank"><img src="{param}" width="100"></a>

Example: (Whatever you want)
Description: (Whatever you want)