can I limit the number of posts displayed

Hello

Love this plug-in using it on my site http://www.mydogfinder.co.uk

One question only is it possible to limit the number of displayed images
Not to bothered what ones just want to limit the number to say 25 so it doesn’t just keep expanding my site is unique in that there will be 100’s of posts that will be feeding this plug in unless I can cap it

Many Thanks

https://wordpress.org/plugins/image-wall/