I use Photo Gallery for all my tagged photos. Until recently, I had a list of all tags down the left side of my screen but I've done something and try as I may I cannot get the tags list back there permanently. Yes, I can get at the tags list by other means but I prefer my original and convenient set up. The tags list was also preceded by a files date list which I used less frequently.

I'm sure that the answer is simple and may need only 2-3 key taps to put it right but I'm clearly not connecting with the correct keys!

I'm on Windows 10 64bit on an HP DV7 laptop.

Can someone please put me out of my misery, please?