I highly suggest a book by Tim Rifat called "Remote Viewing"
He gives excellent scientific research and protocols for developing Psi supposedly better than the Government's psi program. In his protocols he describes a method of developing the "screen" you speak of, but first you must be able to reach an Alpha or Theta state of consiousness...attained through trance meditation . His methods rely mostly on vizualization but are effective. I personally incorporate them into my N.E.W routine. I Hope this helps.
He gives excellent scientific research and protocols for developing Psi supposedly better than the Government's psi program. In his protocols he describes a method of developing the "screen" you speak of, but first you must be able to reach an Alpha or Theta state of consiousness...attained through trance meditation . His methods rely mostly on vizualization but are effective. I personally incorporate them into my N.E.W routine. I Hope this helps.