I'm afraid my original post was not very clear, so I've rewritten my question.
My basic question is how to modify a KML file to best display (in Google My Maps) two or more photos taken at a particular location. No matter what I do to the KML file (see below), when I click on a marker I always end up with only the first picture being displayed TWICE as shown in this example:
Result of clicking on a place marker with 2 pictures
Below is a snippet of my KML code. Please note that <img src... points to the full-sized version of the picture.
# Marker(s) [1, 2]
<Placemark>
<name>Markers 1,2</name>
<styleUrl>#Pic2</styleUrl>
<description>
<![CDATA[
<table>
<tr>
<td>[1] This Monarch butterfly found Bob H. at the beginning of the hike and stayed around quite awhile!</td>
<img src="https://drive.google.com/uc?export=open&id=16a_438A1OCihb1SnYUPm0t9O3WDEdt6u">
</tr>
<tr>
<td>[2] Denny L. along with Sarah (and "Cooper") also seem ready to start.</td>
<img src="https://drive.google.com/uc?export=open&id=1KMGYeJDgqBDJwgkwYju6vlA8--XehACQ">
</tr>
</table>
]]>
</description>
<Point>
<coordinates>-82.7915648,35.2841368</coordinates>
</Point>
</Placemark>
If I click on EITHER of the pictures in the example I get the full-sized version of that picture. Then, using the ">" and "<" that are displayed next to that full-sized picture I can move to the other pictures taken at that location. This isn't TERRIBLE, but I'd really like to initially see thumbnails of all the pictures taken at a particular location. Clicking on a thumbnail should then bring up the full-sized version. (Also, I don't really want 2 copies of the first picture!)
No matter what I do - including adding an line pointing to the thumbnail - I get exactly the same result when clicking on a marker.
I'm not sure if it is possible to do what I'd like, but any suggestions/thoughts would be greatly appreciated!
Wayne