Assistant expands wall art plus creation mode functioanlity, user will find it extremely useful reusing
already existing panels to create wall art from new image.
User can experiment with amount of rows and columns, resizing source image and moving all the panels together
to achieve desired wall art while keeping panels size and thickness intact.
opens Assistant and 
closes it.
Fit width 
enlarges source image to make its width equal to the set of panels width without changing source image aspect ratio.
Fit height 
enlarges source image to make its height equal to the set of panels height without changing source image aspect ratio. Please note, Fit width/height are disabled if Panel size set to "Auto".
Reset 
restores original source image width and height.
Remove row 
removes the only last, if any, row in the panels set and remove column 
removes the only right-most, if any, column in the panels set, Restore row 
and restore column 
will undo removing row or column.
Move 
initiates moving set of panels in respect to source image, 
terminates moving panels and applies corresponding horizontal and vertical offsets to the panels position in respect to source image.
Restores original panels position.