diff --git a/uxntal.1 b/uxntal.1
index 4a2ce1b..fcf7a1d 100644
--- a/uxntal.1
+++ b/uxntal.1
@@ -120,7 +120,7 @@ The program counter (\fIpc\fP) is updated when \fIbool\fP is non-zero. When \fIx
 .SS JSR
 ( x -- [pc+1*] )
 
-Store the next address to execute before unconditionally updating the program counter (\fIpc\fP). This instruction is usually used to invoke subroutines, which use the \fBJMP2r\fP to return.
+Store the next address to execute before unconditionally updating the program counter (\fIpc\fP). This instruction is usually used to invoke subroutines, which use the \fBJMP2r\fP to return. When \fIx\fP is a byte, it is treated as relative (\fBpc += x\fP) and when \fIx\fP is a short it is treated as absolute (\fBpc = x\fP).
 
 .SS STH
 ( x -- [x] )
@@ -241,6 +241,12 @@ The "immediate jump" instructions are produced by the assembler. They interpret
 
 (The instruction pointer will be moved forward 2 bytes, past the relative address.)
 
+These instructions are created by the assembler from special syntax:
+
+    \fB!dest\fP produces \fBJMI wx yz\fP
+    \fB?dest\fP produces \fBJCI wx yz\fP
+    \fBdest\fP  produces \fBJSI wx yz\fP (assuming \fBdest\fP is not a macro or reserved)
+
 .SS LIT, LIT2, LITr, and LIT2r
 
 The "literal" instructions are used to push new data onto the stacks. They interpret the next 1-2 bytes of the ROM (\fIwx\fP, \fIwxyz\fP) as data and push it onto the corresponding stack: