Using the sharpening tool in Photo Editing

Hello all

I need some help, I recently purchased a Dell Inspiron 3455 and when I first got it running I started using a  "sharpening tool" to edit some photos.  I then closed out Photos and can't find this tool again when I open Photos.  Initially it would pop up on the left side of the photo but now I get no editing information on the left side of the photos.  Does anyone have any idea how I can find this "sharpening tool" again?  Thanks for any support you can lend.

Rick