diff --git a/src/Home/Yuugure.ZC b/src/Home/Yuugure.ZC
new file mode 100755
index 00000000..e449e4c5
--- /dev/null
+++ b/src/Home/Yuugure.ZC
@@ -0,0 +1,29 @@
+I64 initialWinBottom = sys_task->win_bottom;
+CDoc *initialDisplayDoc = sys_task->display_doc;
+
+U0 Yuugure()
+{
+  // Hide SysLog
+	if (sys_task->win_bottom != 0) {
+		while(sys_task->win_bottom > -1){
+			sys_task->win_bottom--;
+			Sleep(20);
+		}
+
+    sys_task->display_doc = NULL;
+		WinBorder(OFF, sys_task);
+	}
+  // Show SysLog
+	else {
+    	WinBorder(ON, sys_task);
+		sys_task->display_doc = initialDisplayDoc;
+
+		while(sys_task->win_bottom != initialWinBottom){
+			sys_task->win_bottom++;
+			Sleep(20);
+		}
+
+	}
+
+	WinZBufUpdate;
+}
diff --git a/src/HomeKeyPlugIns.ZC b/src/HomeKeyPlugIns.ZC
index fdc3bda9..0b949635 100755
--- a/src/HomeKeyPlugIns.ZC
+++ b/src/HomeKeyPlugIns.ZC
@@ -110,6 +110,16 @@ Bool MyPutKey(I64 ch, I64 sc)
 						}
 						return TRUE;
 
+					case SC_F12:
+						if (!(sc & SCF_SHIFT))
+						{
+							if (sc & SCF_KEY_DESC)
+								KeyDescSet("Cmd /Yuugure");
+							else
+								Yuugure;
+						}
+						return TRUE;
+
 					case SC_DELETE:
 						if (sc & SCF_SHIFT)
 						{
diff --git a/src/MakeHome.ZC b/src/MakeHome.ZC
index 39f77698..9b650e41 100755
--- a/src/MakeHome.ZC
+++ b/src/MakeHome.ZC
@@ -8,6 +8,7 @@ Cd(__DIR__);;
 #include "~/HomeWrappers"
 MapFileLoad("::/Kernel/Kernel");
 MapFileLoad("::/Compiler/Compiler");
+#include "~/Yuugure"
 #include "~/HomeKeyPlugIns"
 #include "~/HomeSys"
 Cd("..");;