pause

1 files changed, 2 insertions, 0 deletions

diff --git a/index.html b/index.html
index 3bf1d25..55daace 100644
--- a/index.html
+++ b/index.html
@@ -20,6 +20,8 @@ GPL for more details. <a href="https://software.mcgoron.com/peter/scattering.js"
 </ul>
 For each case, what do the wavefronts look like?
 </p>
+<p>CTRL+Click to add an atom. Hold left click to add a plane wave, and release left
+click to launch the plane wave. Press ENTER to pause.</p>
 <button id="clear_waves">Clear waves</button>
 <button id="clear_atoms">Clear atoms</button>
   </body>