Photoshop Elements 15 - crop and size reduce three images for production of mosaic

Young Moon, Mercury and Venus Setting
On 24 May the two day old crescent Moon, Venus and Mercury became visible in the evening sky half-an-hour after sunset despite the glare of a twilight arch. The Moon displaying bright Earthshine was then recorded setting alongside the southern slope of Transmitter Hill from 18.03 to 18.23 in a sequence of 250 stills and these were used to compile a beautiful x60 speed time-lapse animation which will be posted as a comment.