diff --git a/Supported--Algorithms.md b/Supported--Algorithms.md
index 0d436d1..88c8d61 100644
--- a/Supported--Algorithms.md
+++ b/Supported--Algorithms.md
@@ -96,13 +96,15 @@
 
 Many variations of scrypt based algos can be mine by specifying their parameters:
 
-* -N --param-n: This parameter is sometimes specified as :N suffix added to the algo, ie scrypt:1048576
+* -N --param-n: This optional parameter is sometimes specified using the suffix :N added to the algorithm
+parameter, ie scrypt:1048576. The default if not specified is 1024.
 
-* -K --param_key: This is sometimes called client key or pers and is a string. Some algos specify a length
-but cpuminer-opt determines the length automatically. This can result unexpected specifications if set
-incprrectly, as noted in one case below.
+* -K --param_key: This optional parameter is sometimes called "client key" or "pers" and is a string.
+Some algorithms specify a key length but cpuminer-opt determines the length automatically. This can result
+unexpected results if the length was set incorrectly in the specification, as noted in one instance below.
+The default key if not specified is NULL.
 
-* -R --param-r
+* -R --param-r: Optional, the default if not specified is 1.
 
 ### Algorithms using scrypt parameters