Hi fil2,
Yes, - I see what you mean. I think that the powerstore gallery is a condensed version of the solution package, tuned for PowerStore use. As such, I can't find the options to add default sizes that I would usually edit. Hopefully the WA peeps will correct me on this if I am mistaken.
But I think you can hard-code the width value into the JavaScript, as the script overrides any css changes you might make.
I can get it to work fairly nicely for me if I open the In the galleries/slideshow_wide/gallery.js file and - at about line 35 - adjust the following code:
//determine max image size to make sure all fit ok
this.fullsizeWrapper.getElements('img').each(function(image) {
var w = image.get('width').toInt();
if(w > this.maxImageWidth) {
this.maxImageWidth = w;
}
and hard-code the width to (say):
//determine max image size to make sure all fit ok
this.fullsizeWrapper.getElements('img').each(function(image) {
var w = 848;
if(w > this.maxImageWidth) {
this.maxImageWidth = w;
}
This size worked OK for me when I tested it.
This means that I would make sure that any images I uploaded were cropped or resized proportionally in Photoshop (or whatever) to 848px x 260px.
Presumably, the same could be done for the height attribute in the same way.