Admiror Joomla! Community

Hi,
Should I upload my images a set size or is there a way to have them resized when they pop up?
If they can be resized, how?
If they can't be resized, what size do I upload?
Thanks

When image popups it depends on the selected popup, slimbox displays the image in its original size, pirobox automatically adjusts the popup depending on the users resolution.

Well the best think is to upload images in 720p resolution (1280×720) or maybe Full HD (1920x1080) depends on the sites purpose.