Welcome to RMRK.
Well when inside the "Show Picture" command select the desire pciture and the picture number, put the Opacity on 0 and put the X and Y coordinates on your desire location, then put a "Move Picture" command and put the Opacity to 255 and the pictures number, desire time (10 frames = 1 second) with the X and Y coordinates equal to the first command, then do another "Move Picture" command, do the same as the first one except with the Opacity on 0. Well is a little confusing but it will work.