@John Morris If your pics are stored on say a PC and you want to upload photo’s.
Click the box at the extreme right above ^ the box with the landscape in it.
That brings another box up Source is highlighted in blue,to the right of this box is a “camera” click that.
That will bring up where your photo’s are stored/saved find the one you want to upload and click “open”
The “source” box will then be filled with the image details,click “OK” and it will come into your reply field.
Just make sure it is a compatible type like Jpeg and not too large a file size or it will be rejected.