SimpleViewer Config Options says "maxImageWidth" is supposed to under the Standard Options
This means that the attribute is available to be used in the Standard (non-Pro) version of SimpleViewer (not that it is located under the 'Standard' section in svBuilder-Pro).
To set the maxImageWidth and maxImageHeight in svBuilder-Pro, on the 'Images' tab, there is a panel named 'Image Size' at the bottom right hand corner of the window. Click the 'Change...' button to open a panel that will allow you to change the Maximum Width and Maximum Height.
Also, to ensure your images are scaled correctly, you can check the Image Scale Mode in the 'Customize -> Main Image' section.
See here for details on all of the imageScaleMode options: http://simpleviewer.net/simpleviewer/pr … #mainimage
SimpleViewer Support Team.