Getting photos laid out in your reports is easier when you use Photo Content Blocks. You can add a Photo Content Block by clicking on the plus button where you want the new block to be added and choosing the Photos button.
Click on the newly added block in the template viewer to open its editor page. At the top of the editor page are the controls for the block. The first thing you'll want to do is select the source of the photos you want to merge. Remember that photos are always attached to your map geography - points, lines, and polygons.
After selecting the geography group that will be the source of your photos, you can edit the content that is generated for the geography items.
The geography content gives you access to the fields that are in the geography, such as its latitude and longitude location (if it is a point), its Name, and its Description. This content will be repeated in your merged report for every point, line, or polygon in the geography group.
Next, you can choose how to layout the individual photos that are attached to each geography item.
First, choose the maximum number of photos to put in a single row in the report. If your geography has fewer photos, they will simply fill in as many 'slots' as there are photos. If your geography has more photos than will fit in a single row, they will wrap to as many rows as are needed.
Because your report template doesn't know the size and shape of the photos that will ultimately be merged, you can use the Photo alignment and Maximum photo size controls to tell the template how to handle them.
Photo alignment controls how the photo is aligned within the placeholder box you see in the template preview. In the case of a single photo per row, it controls where on the page the photo will be aligned. In the case of multiple photos per row, it will align the photos to the chosen side of the placeholder space.
Use the Maximum photo size controls to set the largest width and height you want any of the photos to be. This is especially important to keep a consistent layout when your geography contains mixtures of portrait and landscape orientation photos.
Your photos will always be scaled to fit within the placeholder box while maintaining their natural aspect ratio - i.e. they won't be distorted in one direction or the other.
Now, you can setup your captions for the photos.
First choose where you want the captions to go relative to the photos. Then, you can use the Photo Caption Content box to layout the data you want merged into the caption. Use the Data Tags menu to choose which fields you want to see. The fields available in the menu come from the data within the photos.