diff --git a/doc/calculator.png b/doc/calculator.png
index faa248b..0564f83 100644
Binary files a/doc/calculator.png and b/doc/calculator.png differ
diff --git a/doc/calculator.xcf b/doc/calculator.xcf
index 0dfc8f9..ef41d9f 100644
Binary files a/doc/calculator.xcf and b/doc/calculator.xcf differ
diff --git a/doc/implementation.rst b/doc/implementation.rst
index 00b0a13..df94ff2 100644
--- a/doc/implementation.rst
+++ b/doc/implementation.rst
@@ -95,9 +95,10 @@ keyboard, so that also makes some sense.
 The logical operations are held together in the usual order you say
 them, AND, OR, XOR, which also is the alphabetical order.
 
-When you feel that you need to work with floating point numbers, you
-probably want to use that PI constant, so the ``FLOAT`` operation to
-switch to floating point mode is on the PI key.
-
 Sign extension is on the ``EEX`` key, which is almost spelled the
 same.
+
+The shifted ``USER`` key performs the ``EXITAPP`` function which
+exists the Ladybug shell and takes you back to the previous shell.
+This key was chosen as it is always free and the ``USER`` key is
+related to affecting the keyboard layout.
diff --git a/doc/keyboard.rst b/doc/keyboard.rst
index 416822b..81e6b1d 100644
--- a/doc/keyboard.rst
+++ b/doc/keyboard.rst
@@ -26,9 +26,9 @@ Deactivation
 ============
 
 Once activated, the HP-41 stays in integer mode until you execute the
-``FLOAT`` instruction. This can be done by pressing the shift key
-followed by the PI (0 key). It is also possible to execute the
-``FLOAT`` instruction using the ``XEQ`` key and spell it out as
+``EXITAPP`` instruction. This can be done by pressing the shift key
+followed by the USER key. It is also possible to execute the
+``EXITAPP`` instruction using the ``XEQ`` key and spell it out as
 usual.
 
 Another way to disable Ladybug is to turn the calculator off and
diff --git a/doc/reference.rst b/doc/reference.rst
index fa9d288..e9a852e 100644
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -28,13 +28,19 @@ well.
 
 .. index:: float mode, mode; float
 
-.. object:: FLOAT
+.. object:: EXITAPP
 
-   Switch to floating point mode, leaving integer mode. This restores
-   the keyboard and display to its normal floating point behavior.
+   Leave integer mode by exiting Ladybug and switching back to
+   floating point mode. This restores the keyboard and display to its
+   normal floating point behavior.
 
-   Integer instructions in floating point mode still works, but will
-   not display or use the dedicated keyboard.
+   Technically it leaves the current active application shell and goes
+   back to the shell that was active before it. The very last such
+   shell is the standard calculator behavior.
+
+   Integer instructions still work when the Ladybug application is
+   inactive. What happens is that the Ladybug display and keyboard
+   overrides are no longer active.
 
 
 .. index:: binary base, base; binary
diff --git a/src/ladybug.s b/src/ladybug.s
index 37f70b5..25d4baa 100644
--- a/src/ladybug.s
+++ b/src/ladybug.s
@@ -85,7 +85,7 @@ XROMno:       .equ    16
 FatStart:
               .fat    LadyHeader    ; ROM header
               FAT     Literal
-              FAT     FLOAT         ; mode change
+              FAT     EXITAPP       ; drop to previous App
               .fat    Integer
               FAT     Binary        ; base related instructions
               FAT     Octal
@@ -1013,19 +1013,16 @@ exitNoUserSTR1:
 
 ;;; **********************************************************************
 ;;;
-;;; FLOAT - restore float mode operation
+;;; EXITAPP - restore float mode operation
 ;;;
-;;; Essentially we just disable our own shell (if it exists).
+;;; In reality we exit the top application shell.
 ;;;
 ;;; **********************************************************************
 
               .section Code, reorder
-              .name   "FLOAT"
-FLOAT:        nop                   ; non-programmable
-                                    ;  (allow  mode switch in program mode)
-              ldi     .low12 ladybugShell
-              gosub   exitShell     ; must be a gosub to provide page address
-              golong  NFRPU         ; must golong as exitShell uses +3 levels
+              .name   "EXITAPP"
+EXITAPP:      gosub   exitApp
+              golong  NFRC
 
               .section Code, reorder
 noBuf:        gosub   errorMessage
@@ -5298,7 +5295,7 @@ keyTable:
               .con    BuiltinKey(0xa8) ; SF
               KeyEntry SB           ; 4
               KeyEntry AND          ; 1  (FIX key)
-              KeyEntry FLOAT        ; 0
+              KeyEntry WSIZE?       ; 0
 
               ;; Logical column 2
               .con    0x10c         ; SQRT  (C digit)
@@ -5355,9 +5352,9 @@ keyTable:
               KeyEntry RRC          ; TAN
               .con    0             ; BST
               KeyEntry CLXI         ; BACKARROW
-              KeyEntry ALDI         ; MODE ALPHA
-              KeyEntry MASKR        ; MODE PRGM
-              KeyEntry MASKL        ; MODE USER
+              KeyEntry MASKR        ; MODE ALPHA
+              KeyEntry MASKL        ; MODE PRGM
+              KeyEntry EXITAPP      ; MODE USER
               .con    0             ; OFF key special
 
 ;;; ----------------------------------------------------------------------