In full Editor, go to File>save for web
In the dialog, under new size, I usually make it 800 px for the longest side, and tick constrain proportions
Save as JPEG (near top)
Good luck with the program!
IT WORKED Thank you so much!!!!!
You're welcome. Glad to help.
If you wish to do this for bulk of files use File->Process Multiple Files option and resize in one go all your images. Make sure you do not overwrite your originals in case you do need to keep them.
Also when you share via Elements Organizer it also gives option to share in specific size.