Does some of the padding issue have to do with the flex feature of the gallery? When I reduce my browser size, that gap starts to decrease quite a bit. Should I be switching to an absolute size during the creation of the gallery?
... will ensure that there is never a gap between the thumbnails and the main image (though large images may be cropped). When using the default value for imageScaleMode ('SCALE'), large images are scaled down to ensure that they are displayed in their entirety at their original aspect ratio and, depending on the dimensions of the user's browser, this may result in a gap between the thumbnails and the main image.
If using imageScaleMode="SCALE", set:
Using a Fixed Layout (to absolutely position gallery elements) would be an alternative method of ensuring that there is never a gap between the thumbnails and the main image.
is there any way to reduce the rather drastic amount of padding around the stage and thumbs?
Please see the Layout Troubleshooting section of the SimpleViewer-Pro Layout Guide which deals with the question:
I have extra spacing in my gallery. How do I get rid of it?
Also, when using a percentage height for your gallery, make sure that all parent containers of the gallery have a height specified via CSS and please see the 'Using Percentage Heights' note in this section.
SimpleViewer Support Team