diff --git a/README.md b/README.md
index 2fb82c2..b3269e9 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,8 @@ On initial load some sensible defaults will be set up. Other options are avialab
 
 At present there is no keyboard input. This is on the TODO list and should get added in the near future (after all, who really wants to use a mouse for anything?).
 
+Most of the keys can be figured out if you don't know what they are already. I will mention that the enter key will add the currently typed in number to the top of the stack. If you have a number typed in, but have not hit enter, and you use a non-numeric/non-enter key (+, swap, sqrt, etc) the number will automatically be added to the top of the stack before the function is run.
+
 ## Dependencies
 
 - Go >= 1.16