On the first slide, between the two pictures, insert a right-facing Block Arrow (default style) that is 0.5 inches high…

On the first slide, between the two pictures, insert a right-facing Block Arrow (default style) that is 0.5 inches high and 2.5 inches wide. Position it so that the left border aligns at the 1.5-inch mark to the left of 0 on the horizontal ruler and the top border aligns at the 1-inch mark under 0 on the vertical ruler