Little demonstration:
1-Launch the emulator now and come back on this page with
[Alt][Tab] sequence.
2-Select the program below with mouse.
10 MODE 0:BORDER 0:PAPER 0:INK 0,0
15 FOR i=0 to 5000
20 x=RND*640:y=RND*400:z=RND*15
30 DRAW x,y,z
40 NEXT:CALL 0
run
3-Click on the mouse right button and select "copy"
4-Click with the mouse right button on the clipboard CpcAlive icon.
5-Select "Modify","Paste"
6-Go back to CpcAlive and wait some seconds...