You will be pleased to know that I have solved the problem of enlarging the 4 x 6 image.
This happened quite by accident when I hit the HELP tab on the said image.

Partly hidden and rather faint behind the HELP tab, I spotted that small square figure which is normally used for maximizing the picture and is sited on the very left of the cross that is used for closing the page.

Ever thankful for your help, your kindness, promptness, and patience with me.

Joe