Scan feature at bottom of window

Hello Friends,

I wonder if someone can assist me. I made the mistake of swiping down on a user interface feature in the main window at the bottom of the screen which said, “Scan document”. This hid that feature unfortunatel.

I have been trying to find how I can get this back but cannot find how to do it.

If anyone knows how, I would be grate full hearing from you.

Many thanks in advance!