Illustrator just randomly changed the format of the colour picker on me. (I know it may have been something I pressed but I had only just opened the document that I had been working on and used the pen tool so have no idea.
Instead of the 'rainbow' being in the narrow swatch and the shades of that colour in the square it looks like the screenshot I am attaching.
Please let me know how I can change it back. I have been using Illustrator for a number of years and have never had this happen before.
Thank you for any help.