Frank C. answered 10/10/20
Certified Microsoft PowerPoint/Word/ General Computer Teacher/Tutor
Photoshop provides solutions for resizing many pictures at once.
Just click the FILE tab.
Then from the drop down menu click on Automate.
And finally choose Batch from that drop down.
Follow along on the new Batch window.
There are many YouTube videos on this topic, so search the web for these.