I spent time taking a bunch of photos.  By default, my phone camera was on the rectangular (4:3) format.  When I uploaded the photos, TradeMe's system cut them down to squares.  No use.  So I had to take new photos. Just now, I wanted to advertise a motorbike accessory.  Before I took any photos, I was careful to switch my phone camera to the SQUARE format.  Then I spent time taking a bunch of photos.  When I uploaded the photos, TradeMe's system cut off the tops and bottoms to fit a rectangular (16:9 landscape) format.  No use.  I will have to take them all again.  Meanwhile, the sun went ...

Thanks, I did read that post, but it was about photo file SIZE - which is a completely unrelated issue.  My issue is the aspect-ratio (square or rectangular).  The TM platform insists on square photos in some places and rectangular photos in other places.  It's nuts!