diff --git a/CHANGELOG.md b/CHANGELOG.md
index 734ce7e..9e9dd79 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ Record of the modification in project development.
 ### Changed
 ### Deprecated
 ### Removed
+- [Issue 35 : Remove XTERMFONTSIZE variable.](https://github.com/suikan4github/kaiten-yaki/issues/35)
+
 ### Fixed
 - [Issue 32 : Ubuntu 22.04 fails to deactivate the swap](https://github.com/suikan4github/kaiten-yaki/issues/32)
 
diff --git a/INSTALL.md b/INSTALL.md
index a4ef2d6..9e3fdcb 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -92,9 +92,6 @@ export OVERWRITEINSTALL=0
 # If you specify 1000, that means 1000mSec. 0 means compile default.  
 export ITERTIME=0
 
-# Void Linux only. Ignored in Ubuntu.
-# The font size of the void-installer
-export XTERMFONTSIZE=11
 ```
 
 There are several restrictions : 
diff --git a/script/config.sh b/script/config.sh
index 22f448f..096c64b 100644
--- a/script/config.sh
+++ b/script/config.sh
@@ -69,9 +69,6 @@ export OVERWRITEINSTALL=0
 # If you specify 1000, that means 1000mSec. 0 means compile default.  
 export ITERTIME=0
 
-# Void Linux only. Ignored in Ubuntu.
-# The font size of the void-installer
-export XTERMFONTSIZE=11
 
 # !!!!!!!!!!!!!! DO NOT EDIT FOLLOWING LINES. !!!!!!!!!!!!!!
 
@@ -91,11 +88,3 @@ else
 # BIOS firmware
 export CRYPTPARTITION=1
 fi  # EFI firmware
-
-# Detect the GUI environment
-# This code is not efered. Just left because it is interestintg code. 
-if env | grep -w -e XDG_SESSION_TYPE -e DISPLAY -e WAYLAND_DISPLAY > /dev/null ; then
-    export GUIENV=1    # set 1 if GUI env.
-else
-    export GUIENV=0    # set 0 if not GUI env.
-fi
\ No newline at end of file