Sorry, my attempt to illustrate the trials failed. I’ll try again, hope this makes sense.
Trial 1
Image A _________Image B
“F”______________ “J”
Press F: Image A is selected, no highlighting
Press J: Image B is selected, image B is highlighted
Trial 2
Image B______ Image A
“F” ____________“J”
Press F: Image B is selected, no highlighting
Press J: Image A is selected, Image B is highlighted
*Highlighting: Box appears around the image