I have purchased from Catooh the Monitor effect transition slide.How do I place a picture in the notepad and the green screen which appear when the slide is in operation"
Is your question about how to place the transition in your timeline, or is it about how to use the green screen to place an object in the transition? Two very different questions. You don't use windows notepad for either, in fact don't use windows notepad for anything in video.
Does the transition work correctly as I posted previously?
Looking at the transition - you need to use the green screen effect (in the computer monitor) to show one image and place an image on the notepad on the desk.
To get what you want the following should work:
Place the image to appear on the monitor on a track above the transition, apply the Chroma Key green effect to the transition.
Resize the image to fit.
On a track below the transition position the image you want on the notebook and resize and distort using the Movement Effects options as required.