How to prevent pictures to be stretched in WPL?

You may use different image sizes for your WPL website, Or you may have MLS/IDX integration on your website and properties has multiple image sizes, If you set a size for all images they may be stretched. In order to prevent this issue, You need to set a flexible size. 

In order to do this go to WPL -> Activity Manager -> Edit "listing_gallery" activity which you want to fix:

1- Property show page --> "pshow_gallery" position
2- Property listing page --> "wpl_property_listing_image" positions

Then change the height to your desire height and set the width as "auto", Like the following picture:

This way your pictures will be resized automatically.