diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/normal/menu.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/normal/menu.c
index 955608a0..9b1d3140 100644
--- a/GRUB2/MOD_SRC/grub-2.04/grub-core/normal/menu.c
+++ b/GRUB2/MOD_SRC/grub-2.04/grub-core/normal/menu.c
@@ -49,6 +49,19 @@ int g_ventoy_menu_esc = 0;
 int g_ventoy_fn_mutex = 0;
 int g_ventoy_terminal_output = 0;
 
+#define VTOY_COMM_HOTKEY(cmdkey) \
+if (0 == g_ventoy_fn_mutex) { \
+    cmdstr = grub_env_get(cmdkey); \
+    if (cmdstr) \
+    { \
+        menu_fini (); \
+        g_ventoy_fn_mutex = 1; \
+        grub_script_execute_sourcecode(cmdstr); \
+        g_ventoy_fn_mutex = 0; \
+        goto refresh; \
+    } \
+}
+
 /* Time to delay after displaying an error message about a default/fallback
    entry failing to boot.  */
 #define DEFAULT_ENTRY_ERROR_DELAY_MS  2500
@@ -388,7 +401,7 @@ int g_menu_update_mode = 0;
 int g_ventoy_tip_label_enable = 0;
 const char * g_ventoy_tip_msg1 = NULL;
 const char * g_ventoy_tip_msg2 = NULL;
-
+static const char *g_ventoy_cur_img_path = NULL;
 static void menu_set_chosen_tip(grub_menu_t menu, int entry)
 {
     img_info *img;
@@ -402,6 +415,7 @@ static void menu_set_chosen_tip(grub_menu_t menu, int entry)
         {
             g_ventoy_tip_msg1 = img->tip1;
             g_ventoy_tip_msg2 = img->tip2;
+            g_ventoy_cur_img_path = img->path;
         }
     }
 }
@@ -835,71 +849,23 @@ run_menu (grub_menu_t menu, int nested, int *auto_boot)
 
         case GRUB_TERM_KEY_F2:
         case '2':
-            if (0 == g_ventoy_fn_mutex) {
-                cmdstr = grub_env_get("VTOY_F2_CMD");
-                if (cmdstr)
-                {
-                    menu_fini ();
-                    g_ventoy_fn_mutex = 1;
-                    grub_script_execute_sourcecode(cmdstr);
-                    g_ventoy_fn_mutex = 0;
-                    goto refresh;
-                }
-            }
+            VTOY_COMM_HOTKEY("VTOY_F2_CMD");
             break;
         case GRUB_TERM_KEY_F3:
         case '3':
-            if (0 == g_ventoy_fn_mutex) {
-                cmdstr = grub_env_get("VTOY_F3_CMD");
-                if (cmdstr)
-                {
-                    menu_fini ();
-                    grub_script_execute_sourcecode(cmdstr);
-                    goto refresh;
-                }
-            }
+            VTOY_COMM_HOTKEY("VTOY_F3_CMD");
             break;
         case GRUB_TERM_KEY_F4:
         case '4':
-            if (0 == g_ventoy_fn_mutex) {
-                cmdstr = grub_env_get("VTOY_F4_CMD");
-                if (cmdstr)
-                {
-                    menu_fini ();
-                    g_ventoy_fn_mutex = 1;
-                    grub_script_execute_sourcecode(cmdstr);
-                    g_ventoy_fn_mutex = 0;
-                    goto refresh;
-                }
-            }
+            VTOY_COMM_HOTKEY("VTOY_F4_CMD");
             break;
         case GRUB_TERM_KEY_F5:
         case '5':
-            if (0 == g_ventoy_fn_mutex) {
-                cmdstr = grub_env_get("VTOY_F5_CMD");
-                if (cmdstr)
-                {
-                    menu_fini ();
-                    g_ventoy_fn_mutex = 1;
-                    grub_script_execute_sourcecode(cmdstr);
-                    g_ventoy_fn_mutex = 0;
-                    goto refresh;
-                }
-            }
+            VTOY_COMM_HOTKEY("VTOY_F5_CMD");
             break;
         case GRUB_TERM_KEY_F6:
         case '6':
-            if (0 == g_ventoy_fn_mutex) {
-                cmdstr = grub_env_get("VTOY_F6_CMD");
-                if (cmdstr)
-                {
-                    menu_fini ();
-                    g_ventoy_fn_mutex = 1;
-                    grub_script_execute_sourcecode(cmdstr);
-                    g_ventoy_fn_mutex = 0;
-                    goto refresh;
-                }
-            }
+            VTOY_COMM_HOTKEY("VTOY_F6_CMD");
             break;
         case GRUB_TERM_KEY_F7:
             menu_fini ();
@@ -945,6 +911,38 @@ run_menu (grub_menu_t menu, int nested, int *auto_boot)
             g_ventoy_menu_refresh = 1;
             goto refresh;
 
+        case (GRUB_TERM_CTRL | 'h'):
+        {
+            cmdstr = grub_env_get("VTOY_HELP_CMD");
+            if (cmdstr)
+            {
+                grub_script_execute_sourcecode(cmdstr);
+                while (grub_getkey() != GRUB_TERM_ESC)
+                    ;
+                menu_fini ();
+                goto refresh;
+            }
+            break;
+        }
+        case (GRUB_TERM_CTRL | 'm'):
+        {
+            if (g_ventoy_cur_img_path)
+            {
+                grub_env_set("VTOY_CHKSUM_FILE_PATH", g_ventoy_cur_img_path);
+                cmdstr = grub_env_get("VTOY_CHKSUM_CMD");
+                if (cmdstr)
+                {
+                    menu_fini();
+                    grub_script_execute_sourcecode(cmdstr);
+                    goto refresh;
+                }
+            }
+            else
+            {
+                grub_env_set("VTOY_CHKSUM_FILE_PATH", "X");
+            }
+            break;
+        }
 	    default:
 	      {
 		int entry;
diff --git a/INSTALL/grub/checksum.cfg b/INSTALL/grub/checksum.cfg
new file mode 100644
index 00000000..53dc6387
--- /dev/null
+++ b/INSTALL/grub/checksum.cfg
@@ -0,0 +1,31 @@
+menuentry "Calculate md5sum" --class=checksum_md5 {
+    md5sum "${vtoy_iso_part}${VTOY_CHKSUM_FILE_PATH}"
+    
+    echo -e "\n\npress ENTER to exit ..."
+    read vtInputKey
+}
+
+menuentry "Calculate sha1sum" --class=checksum_sha1 {
+    sha1sum "${vtoy_iso_part}${VTOY_CHKSUM_FILE_PATH}"
+    
+    echo -e "\n\npress ENTER to exit ..."
+    read vtInputKey
+}
+
+menuentry "Calculate sha256sum" --class=checksum_sha256 {
+    sha256sum "${vtoy_iso_part}${VTOY_CHKSUM_FILE_PATH}"
+    
+    echo -e "\n\npress ENTER to exit ..."
+    read vtInputKey
+}
+
+menuentry "Calculate sha512sum" --class=checksum_sha512{
+    sha512sum "${vtoy_iso_part}${VTOY_CHKSUM_FILE_PATH}"
+    
+    echo -e "\n\npress ENTER to exit ..."
+    read vtInputKey
+}
+
+menuentry 'Return to previous menu [Esc]' --class=vtoyret VTOY_RET {
+    echo 'Return ...'
+}
diff --git a/INSTALL/grub/grub.cfg b/INSTALL/grub/grub.cfg
index 95db8044..103b4c51 100644
--- a/INSTALL/grub/grub.cfg
+++ b/INSTALL/grub/grub.cfg
@@ -90,6 +90,28 @@ function ventoy_ext_menu {
     fi
 }
 
+function ventoy_checksum {
+    if [ -f "${vtoy_iso_part}${VTOY_CHKSUM_FILE_PATH}" ]; then
+        configfile $prefix/checksum.cfg
+    fi
+}
+
+function ventoy_show_help {
+    if [ -f $prefix/help.tar.gz ]; then
+        if [ -z "$vtoy_help_txt_mem_addr" ]; then
+            vt_load_file_to_mem "auto" $prefix/help.tar.gz vtoy_help_txt_mem
+        fi
+
+        loopback vt_help_tarfs mem:${vtoy_help_txt_mem_addr}:size:${vtoy_help_txt_mem_size}
+        if [ -f "(vt_help_tarfs)/help/${VTOY_HELP_TXT_LANGUAGE}.txt" ]; then
+            cat "(vt_help_tarfs)/help/${VTOY_HELP_TXT_LANGUAGE}.txt"
+        else
+            cat "(vt_help_tarfs)/help/en_US.txt"
+        fi        
+        loopback -d vt_help_tarfs
+    fi
+}
+
 function get_os_type {
     set vtoy_os=Linux
     
@@ -1987,6 +2009,11 @@ set VTOY_F2_CMD="ventoy_power"
 set VTOY_F4_CMD="ventoy_localboot"
 set VTOY_F5_CMD="ventoy_diagnosis"
 set VTOY_F6_CMD="ventoy_ext_menu"
+set VTOY_HELP_CMD="ventoy_show_help"
+set VTOY_CHKSUM_CMD="ventoy_checksum"
+set VTOY_HELP_TXT_LANGUAGE="en_US"
+set VTOY_CHKSUM_FILE_PATH="X"
+
 
 if [ "$grub_platform" = "pc" ]; then
     set VTOY_TEXT_MENU_VER="Ventoy $VENTOY_VERSION BIOS  www.ventoy.net"
@@ -2076,10 +2103,10 @@ fi
 
 if [ $VTOY_DEFAULT_MENU_MODE -eq 0 ]; then
     set VTOY_F3_CMD="vt_dynamic_menu 1 1"
-    set VTOY_HOTKEY_TIP="F1:Memdisk  F2:Power  F3:TreeView  F4:Localboot  F5:Tools  F6:ExMenu"
+    set VTOY_HOTKEY_TIP="F1:Memdisk F2:Power F3:TreeView F4:Localboot F5:Tools F6:ExMenu Ctrl+h:Help"
 else
     set VTOY_F3_CMD="vt_dynamic_menu 1 0"
-    set VTOY_HOTKEY_TIP="F1:Memdisk  F2:Power  F3:ListView  F4:Localboot  F5:Tools  F6:ExMenu"
+    set VTOY_HOTKEY_TIP="F1:Memdisk F2:Power F3:ListView F4:Localboot F5:Tools F6:ExMenu Ctrl+h:Help"
 fi
 
 
@@ -2167,6 +2194,14 @@ export VTOY_ISO_RAW_STR
 export VTOY_GRUB2_MODE_STR
 export VTOY_WIMBOOT_MODE_STR
 export VTOY_ISO_UEFI_DRV_STR
+export VTOY_F2_CMD
+export VTOY_F4_CMD
+export VTOY_F5_CMD
+export VTOY_F6_CMD
+export VTOY_HELP_CMD
+export VTOY_CHKSUM_CMD
+export VTOY_HELP_TXT_LANGUAGE
+export VTOY_CHKSUM_FILE_PATH
 
 
 #special VTOY_DEFAULT_IMAGE process
diff --git a/INSTALL/grub/help/en_US.txt b/INSTALL/grub/help/en_US.txt
new file mode 100644
index 00000000..acd96a66
--- /dev/null
+++ b/INSTALL/grub/help/en_US.txt
@@ -0,0 +1,16 @@
+Ctrl+h - Display this help information
+F1 - Memdisk Mode (Only for small WinPE/LiveCD ISO/IMG)
+F2 - Reboot/Power off
+F3 - Switch menu mode between Treeview <-> ListView
+F4 - Boot Windows/Linux in local disk
+F5 - Utilities
+F6 - Load Custom Grub2 Menu
+F7 - Switch between GUI Mode <-> TEXT Mode
+
+Ctrl+m - Checksum image files (md5/sha1/sha256/sha512)
+Ctrl+w - WIMBOOT Mode (Only for standard Windows ISO)
+Ctrl+r - Grub2 Mode (Only for some Linux distros)
+Ctrl+i - Compatible Mode (Just only for test)
+
+
+Press ESC to return ......
diff --git a/INSTALL/grub/help/zh_CN.txt b/INSTALL/grub/help/zh_CN.txt
new file mode 100644
index 00000000..ff7fcfca
--- /dev/null
+++ b/INSTALL/grub/help/zh_CN.txt
@@ -0,0 +1,15 @@
+Ctrl+h - 显示本帮助信息
+F1 - 把文件加载到内存启动（只适用于文件很小的 WinPE/LiveCD等）
+F2 - 电源操作 （重启、关机）
+F3 - 菜单显示模式切换。可在列表模式和目录模式之间自由切换。
+F4 - 启动本地硬盘上的 Windows/Linux 等系统。
+F5 - 各类工具
+F6 - 加载自定义 GRUB2 菜单。
+F7 - 界面在文本模式和图形模式之间切换。
+
+Ctrl+m - 计算文件校验值（md5/sha1/sha256/sha512）
+Ctrl+w - WIMBOOT 模式 （只适用于标准的 Windows ISO文件）
+Ctrl+r - Grub2 模式 （只适用于常见的一些 Linux 系统ISO文件）
+Ctrl+i - 兼容模式 （只用作调试目的，不能正式使用）
+
+按 ESC 键返回 ......
diff --git a/INSTALL/grub/themes/ventoy/theme.txt b/INSTALL/grub/themes/ventoy/theme.txt
index 75c5f3ab..88e8a21f 100644
--- a/INSTALL/grub/themes/ventoy/theme.txt
+++ b/INSTALL/grub/themes/ventoy/theme.txt
@@ -46,7 +46,7 @@ terminal-box: "terminal_box_*.png"
 }
 
 + hbox{ 
-    left = 30%
+    left = 28%
     top = 95%
     width = 10%
     height = 25