You have 3 kinds of images:
thumbnail, normal image and original image.
- thumbnail is controlled by thumbnail size.. ACP->Vbgallery->Settings default is 100
- normal image is controlled by ACP->Vbgallery->Image types
there you can set max width and max height.. ATTENTION, these 2 values should be the same.. good values are from 400 to 600
- Original image here you have a difference between vbgallery 2.5x and 3.0
In both you have to set ACP->Vbgallery->Settings Keep original to YES
Additionally in vbgallery 3.0 you can resize original if you input a size.. (good value is 1024)
For all of these settings,
they only work for
NEW uploads AFTER you changed them... if you want to apply them for old existing images, you have to regenerate them in 2 passes, in ACP->Vbgallery->Maintenance
Rebuild Thumbnail and Rebuild normal images (in vbgallery 3 you can also rebuild originals - this new option will only work if your new resize original is smaller than the old one)
Luc