diff --git a/res/DFX.CONF b/res/DFX.CONF
index 312607d6e..70828af03 100644
--- a/res/DFX.CONF
+++ b/res/DFX.CONF
@@ -11,9 +11,10 @@
 # Transition effects are binary files loaded at $6000 and called with main
 # memory banked in, DHGR page 1 showing, and the next DHGR graphic already
 # loaded at $4000/main and $4000/aux. A transition effect has full use of
-# auxiliary memory, zero pages (both), text pages (both, but preserve screen
-# holes), and main memory $6000-$BEFF. $BF00-$BFFF/main is reserved for the
-# ProDOS shim. LC RAM banks 1 and 2 are reserved for the launcher.
+# zero pages (both), $0200-$07FF (both), $6000-$BEFF/main, $800-$1FFF/aux,
+# and $6000-$BFFF/aux. $800-$1FFF/main is reserved for the slideshow data.
+# $BF00-$BFFF/main is reserved for the ProDOS shim. LC RAM banks 1 and 2 are
+# reserved for the launcher.
 #
 # Important: LC RAM bank 1 will be read/write on entry and must be read/write
 # on exit. If you need ROM routines, you are responsible for switching to ROM
diff --git a/res/FX.CONF b/res/FX.CONF
index cc50bda49..756de4104 100644
--- a/res/FX.CONF
+++ b/res/FX.CONF
@@ -10,10 +10,9 @@
 #
 # Transition effects are binary files loaded at $6000 and called with
 # hi-res page 1 showing and the next HGR graphic already loaded at $4000.
-# A transition effect can use $6000-$BEFF in main memory, zero page, and
-# text page if needed (but preserve the screen holes). $800-$1FFF is reserved
-# for the slideshow data. $BF00-$BFFF is reserved for the ProDOS shim.
-# LC RAM banks 1 and 2 are reserved for the launcher.
+# A transition effect can use $6000-$BEFF, zero page, and $0200-$07FF.
+# $800-$1FFF is reserved for the slideshow data. $BF00-$BFFF is reserved for
+# the ProDOS shim. LC RAM banks 1 and 2 are reserved for the launcher.
 #
 # Important: LC RAM bank 1 will be read/write on entry and must be read/write
 # on exit. If you need ROM routines, you are responsible for switching to ROM
diff --git a/res/SFX.CONF b/res/SFX.CONF
index 67e60e730..b8a3cf847 100644
--- a/res/SFX.CONF
+++ b/res/SFX.CONF
@@ -9,11 +9,10 @@
 # file should not contain duplicates.
 #
 # Transition effects are binary files loaded at $A000 and called with main
-# memory banked in and the next SHR graphic already loaded at $2000/main.
-# A transition effect has full use of zero page (main), text page (main,
-# but preserve screen holes), and $A000-$BEFF/main. $BF00-$BFFF/main is
-# reserved for the ProDOS shim. LC RAM banks 1 and 2 are reserved for the
-# launcher.
+# memory banked in (read/write) and the next SHR graphic already loaded at
+# $2000/main. A transition effect has full use of zero page (main),
+# $0200-$07FF (main), and $A000-$BEFF/main. $BF00-$BFFF/main is reserved for
+# the ProDOS shim. LC RAM banks 1 and 2 are reserved for the launcher.
 #
 # /!\ You can not assume auxiliary memory exists! No, really.
 #
@@ -36,8 +35,8 @@
 # Important: LC RAM bank 1 will be read/write on entry and must be read/write
 # on exit. If you need ROM routines, you are responsible for switching to ROM
 # then switching back to RAM bank 1 (read/write) before returning. However,
-# you can leave WRITEAUXMEM active. The calling code will unconditionally
-# switch back to WRITEMAINMEM.
+# you can leave WRITEAUXMEM active; the calling code unconditionally switches
+# back to WRITEMAINMEM after the transition code returns.
 #
 # This file is converted to a binary data structure (SFX.IDX) during build
 # then added to TOTAL.DATA on the final disk image.