Try changing the app screen grid sizes under the home screen option in the phone settings. The larger the grid the smaller the icons. I hope this helps.
Thanks for your reply. I did as you suggested, but going into the home screen settings, I cannot find anything that tells you how to resize icons. I had no problem prior to yesterday's update.
I have found out the problem. Thanks for your help. When my phone updated yesterday, it switched to Easy Mode, which made the icons larger. I turned Easy Mode off, and icons went back to as they were before.