diff --git a/source/ubl-settings-bootloader.cc b/source/ubl-settings-bootloader.cc
index 18c06ab..241e9ca 100755
--- a/source/ubl-settings-bootloader.cc
+++ b/source/ubl-settings-bootloader.cc
@@ -169,7 +169,7 @@ void MainWindow::get_download_mode(string cmd, std::map <string, string> &map_te
     int start_error = index_error;
     struct Result<string> res_response = this->wrapper_call(cmd);
     if (res_response.error == 0) {
-        str_replace_all(res_response.response, "\"","");
+        Utils::str_replace_all(res_response.response, "\"","");
         if (res_response.response == "splash") {
             cmbDownloadMode->set_active(0);
             map_temp["GRUB_BOOT_SILENT"] = "splash";
@@ -274,8 +274,8 @@ void MainWindow::get_security_login(string cmd, std::map <string, string> &map_t
     // Убрать в будущем
     string default_login = "superadmin";
     if (res_response.error == 0) {
-        str_replace_all(res_response.response, " ","");
-        str_replace_all(res_response.response, "\"","");
+        Utils::str_replace_all(res_response.response, " ","");
+        Utils::str_replace_all(res_response.response, "\"","");
         if (res_response.response.length() > 0) {
             chbSecurityLogin->set_active(1);
             map_temp["GRUB_USER"] = res_response.response;
@@ -343,7 +343,7 @@ void MainWindow::get_password_protec(string cmd, std::map <string, string> &map_
     int start_error = index_error;
     struct Result<string> res_response = this->wrapper_call(cmd);
     if (res_response.error == 0) {
-        str_replace_all(res_response.response, "\"","");
+        Utils::str_replace_all(res_response.response, "\"","");
         if (res_response.response.length() != 0) {
             chbPasswordProtecc->set_active(1);
             map_temp["GRUB_PASSWORD"] = res_response.response;
@@ -402,7 +402,7 @@ string MainWindow::dynamic_update_entry(std::map<string, string> &map_view, vect
 
 
 vector<string> MainWindow::read_file_and_view(string file_name ,Gtk::TreeModel::Row &row, Glib::RefPtr<Gtk::ListStore> list_store_m) {
-    std::array<std::vector<std::string>, 5> arr_view = read_csv(path_resources + "/" + file_name);
+    std::array<std::vector<std::string>, 5> arr_view = Utils::read_csv(path_resources + "/" + file_name);
     std::vector<std::string> vec_Option =  arr_view[0];
     for (size_t index = 0; index < vec_Option.size(); index++) {
 
@@ -540,15 +540,15 @@ vector<string> MainWindow::get_setting_entry_all(string key, string cmd, Gtk::En
     vector<string> vec_params;
     struct Result<string> res_response = this->wrapper_call(cmd);
     if (res_response.error == 0) {
-        str_replace_all(res_response.response, "\"", "");
-        vec_params = split(res_response.response, ' ');
-        str_replace_all(res_response.response, " ", ", ");
+        Utils::str_replace_all(res_response.response, "\"", "");
+        vec_params = Utils::split(res_response.response, ' ');
+        Utils::str_replace_all(res_response.response, " ", ", ");
         entry_text.set_text(res_response.response);
         for (auto &param: vec_params) {
             map_cmd_selection[param] = "1";
             map_temp[param] = "1";
         }
-        str_remove(res_response.response, ",");
+        Utils::str_remove(res_response.response, ",");
         map_temp[key] = res_response.response;
     }
     else if (res_response.error == 3) {
@@ -609,8 +609,8 @@ void MainWindow::set_entry_to_tree_view(Glib::RefPtr<Gtk::ListStore> &list_store
     flag_blocked_tree_view = true;
     vector<string> vec_params;
     std::string text = entry.get_text();
-    str_replace_all(text, " ", "");
-    vec_params = split(text, ',');
+    Utils::str_replace_all(text, " ", "");
+    vec_params = Utils::split(text, ',');
     for (auto &name: vec_Option) {
         this->set_row(list_store, size, name, false);
     }
@@ -680,10 +680,10 @@ void MainWindow::set_menu_boot(string cmd = "", string cmd_remove = "") {
 
 void MainWindow::cmd_entry_all(Gtk::Entry &entry, string cmd_settings, string cmd_remove) {
     string cmds = entry.get_text();
-    str_remove(cmds, ",");
+    Utils::str_remove(cmds, ",");
     if (cmds.length() != 0) {
         cmd_settings += "\"" + cmds + "\"";
-        str_replace_all(cmd_settings, " \"", "\"");
+        Utils::str_replace_all(cmd_settings, " \"", "\"");
         this->wrapper_system(cmd_settings, "");
     }
     else {
@@ -709,6 +709,7 @@ void MainWindow::event(){
     chbSecurityLogin->signal_changed().connect(sigc::mem_fun(*this, &MainWindow::change_security_login));
     cmbDownloadMode->signal_changed().connect([&]() {set_download_mode();});
     chbSecurityLogin->signal_changed().connect([&]() {set_security_login();});
+    cmbDefaultDonw->signal_changed().connect([&]() {set_default_load("","");});
     spbSecond->signal_changed().connect([&]() {set_menu_boot();});
     if (this->check_root() == 0) {
         Glib::RefPtr<Gtk::TreeModel> treeViewKernelModel = treeViewKernel->get_model();
@@ -742,6 +743,55 @@ void MainWindow::change_security_login() {
         boxSave->set_sensitive(true);
     }
 }
+void MainWindow::set_default_load(string cmd = "", string cmd_remove = "") {
+    int index = cmbDefaultDonw->get_active_row_number();
+    if (index == 0) {
+        if (cmd.length() != 0) {
+            wrapper_system(cmd, "");
+        }
+        else {
+            flag_save_local = true;
+            flag_save_global = true;
+            flag_save_all = true; 
+        }
+    }
+    else if (index > 0) {
+        if (cmd_remove.length() != 0) {
+            wrapper_system(cmd_remove, "");
+        }
+        else {
+            flag_save_local = true;
+            flag_save_global = true;
+            flag_save_all = true; 
+        }
+    }
+    if (index != 0 && index != -1) {
+        map_cmd_selection["GRUB_DEFAULT"] = cmbDefaultDonw->get_active_text();
+    }
+    else {
+        map_cmd_selection["GRUB_DEFAULT"] = "";
+    }
+}
+
+void MainWindow::get_default_load(string cmd, std::map <string, string> &map_temp) {
+    int start_error = index_error;
+    struct Result<string> res_response = this->wrapper_call(cmd);
+    if (res_response.error == 0) {
+        map_temp["GRUB_DEFAULT"] = res_response.response;
+        cmbDefaultDonw->set_active_text(res_response.response);
+    }
+    else if (res_response.error == 3) {
+        if (start_error != index_error) {
+            index_error = start_error;
+            cmbDefaultDonw->set_active(0);
+        }
+        map_temp["GRUB_DEFAULT"] = "";
+
+    }
+    else {
+        map_temp["GRUB_DEFAULT"] = "";
+    }
+}
 
 void MainWindow::change_password_protecc() {
     int index = chbPasswordProtecc->get_active_row_number();
@@ -835,6 +885,12 @@ bool MainWindow::save_global_cfg() {
                 this->set_password_protec(cmd_password, cmd_password_remove);
                 flag_no_save = false;
             }
+            if (this->check_save(flag_save, "GRUB_DEFAULT")) {
+                string cmd_load = "ubconfig --target global set boot GRUB_DEFAULT=";
+                string cmd_load_remove = "ubconfig --target global remove boot GRUB_DEFAULT";
+                this->set_default_load(cmd_load, cmd_load_remove);
+                flag_no_save = false;
+            }
         }
     }
     map_global_cmd_selection = map_cmd_selection;
@@ -897,6 +953,13 @@ bool MainWindow::save_local_cfg() {
                 this->set_password_protec(cmd_password, cmd_password_remove);
                 flag_no_save = false;
             }
+            if (this->check_save(flag_save, "GRUB_DEFAULT")) {
+                string cmd_load = "ubconfig --target system set boot GRUB_DEFAULT=";
+                string cmd_load_remove = "ubconfig --target system remove boot GRUB_DEFAULT";
+                this->set_default_load(cmd_load, cmd_load_remove);
+                flag_no_save = false;
+            }
+            
         }
     }
     map_local_cmd_selection = map_cmd_selection;
@@ -905,16 +968,16 @@ bool MainWindow::save_local_cfg() {
 
 void MainWindow::set_data_cfg() {
     string str_flags = entryKernel->get_text();
-    str_remove(str_flags, ",");
-    str_replace_all(str_flags, " \"", "\"");
+    Utils::str_remove(str_flags, ",");
+    Utils::str_replace_all(str_flags, " \"", "\"");
     map_cmd_selection["GRUB_CMDLINE_LINUX"] = str_flags;
     str_flags = entryIPT->get_text();
-    str_remove(str_flags, ",");
-    str_replace_all(str_flags, " \"", "\"");
+    Utils::str_remove(str_flags, ",");
+    Utils::str_replace_all(str_flags, " \"", "\"");
     map_cmd_selection["GRUB_TERMINAL_INPUT"] = str_flags;
     str_flags = entryOTT->get_text();
-    str_remove(str_flags, ",");
-    str_replace_all(str_flags, " \"", "\"");
+    Utils::str_remove(str_flags, ",");
+    Utils::str_replace_all(str_flags, " \"", "\"");
     map_cmd_selection["GRUB_TERMINAL_OUTPUT"] = str_flags;
 }
 
@@ -940,6 +1003,7 @@ void MainWindow::download_globl_cfg() {
     this->get_download_mode("ubconfig --default --source global get boot GRUB_BOOT_SILENT", map_global_cmd_selection);
     this->get_security_login("ubconfig --default --source global get boot GRUB_USER", map_global_cmd_selection);
     this->get_password_protec("ubconfig --default --source global get boot GRUB_PASSWORD", map_global_cmd_selection);
+    this->get_default_load("ubconfig --default --source global get boot GRUB_DEFAULT", map_global_cmd_selection);
     info_warning_error(1);
     map_cmd_selection = map_global_cmd_selection;
     
@@ -967,6 +1031,7 @@ void MainWindow::download_local_cfg() {
     this->get_download_mode("ubconfig --default --source system get boot GRUB_BOOT_SILENT", map_local_cmd_selection);
     this->get_security_login("ubconfig --default --source system get boot GRUB_USER", map_local_cmd_selection);
     this->get_password_protec("ubconfig --default --source system get boot GRUB_PASSWORD", map_local_cmd_selection);
+    this->get_default_load("ubconfig --default --source system get boot GRUB_DEFAULT", map_local_cmd_selection);
     info_warning_error(0);
     map_cmd_selection = map_local_cmd_selection;
 }
@@ -1051,7 +1116,6 @@ void MainWindow::wrapper_system(string cmd, string thread_str = "") {
 }
 
 void MainWindow::info_status_app(string stule) {
-    
     boxInfo->remove_class("boxInfoMessOK");
     boxInfo->remove_class("boxInfoMessError");
     boxInfo->add_class(stule);
@@ -1111,7 +1175,7 @@ void MainWindow::info_warning_error(int mess) {
 
 struct MainWindow::Result<string> MainWindow::wrapper_call(string cmd) {
     struct Result<string> obj_result;
-    string response = call(cmd);
+    string response = Utils::call(cmd);
     if ((response.find("(null)") == std::string::npos) && (response.length() != 0 )) {
         if (response.find("=") != std::string::npos) {
             if (response.find("\n") != std::string::npos) {
@@ -1152,7 +1216,7 @@ void MainWindow::log_mess_error(string &cmd) {
         str_cmd_error = map_cmd_error[cmd]; 
     }
     else {
-        for ( const auto &map_iter: map_cmd_error ) {
+        for (const auto &map_iter: map_cmd_error) {
         key = map_iter.first;
         if (cmd.find(key) != std::string::npos){
             str_cmd_error = map_iter.second;   
diff --git a/source/ubl-settings-bootloader.h b/source/ubl-settings-bootloader.h
index c6914e5..63466d1 100644
--- a/source/ubl-settings-bootloader.h
+++ b/source/ubl-settings-bootloader.h
@@ -137,6 +137,7 @@ class MainWindow : public Gtk::ApplicationWindow {
         MainWindow(Glib::RefPtr<Gtk::Builder> const& builder);
         void get_menu_boot(string cmd, std::map <string, string> &map_temp);
         void set_menu_boot(string cmd, string cmd_remove);
+        void set_default_load(string cmd, string cmd_remove);
         void set_row_all(std::map <string, string> &map_cmd, Glib::RefPtr<Gtk::ListStore> &list_store, vector<string> &list_params, size_t size);
         void set_row(Glib::RefPtr<Gtk::ListStore> &list_store, int size, std::string name, bool flag_chbox);
         void get_builder();
@@ -179,6 +180,7 @@ class MainWindow : public Gtk::ApplicationWindow {
         void change_password_protecc();
         bool focus_out_txt_login(GdkEventFocus*);
         void change_security_login();
+        void get_default_load(string cmd, std::map <string, string> &map_temp);
         bool focus_out_txt_password(GdkEventFocus*);
         void get_password_protec(string cmd, std::map <string, string> &map_temp);
         void set_password_protec(string cmd, string cmd_remove);
diff --git a/source/util.cc b/source/util.cc
index ed9a3ce..8d8c496 100644
--- a/source/util.cc
+++ b/source/util.cc
@@ -1,5 +1,7 @@
 #include "util.h"
 
+namespace Utils {
+
 array<vector<string>, 5> read_csv(const string& filename) {
     array<vector<string>, 5> array_vectors;
     vector<string> vec_option;
@@ -65,6 +67,7 @@ string call(string cmd) {
     }
     return path;
 }
+
 vector<int> find_all(string &str_ntp, string substr) {
     size_t index = 0;
     vector<int> sub_index;
@@ -181,4 +184,15 @@ string read_passwd(string username) {
     }
     in.close(); 
     return passwd;
+}
+
+int synopsis_show(string str_link) {
+    // gettext("https://wiki.ublinux.com/ru/Программное_обеспечение/Программы_и_утилиты/Все/")
+    string cmd = "xdg-open " + str_link;
+    if (geteuid() == 0) {
+        string response_user = getlogin();
+        cmd = "su -l " + response_user + " -c \" DISPLAY=$DISPLAY " + cmd + " \"";
+    }
+    return system(cmd.c_str());
+}
 }
\ No newline at end of file
diff --git a/source/util.h b/source/util.h
index 54b56fd..9044b95 100644
--- a/source/util.h
+++ b/source/util.h
@@ -1,3 +1,5 @@
+#ifndef UTIL_H
+#define UTIL_H
 #include <stdio.h>
 #include <iostream>
 #include <sstream>
@@ -8,13 +10,26 @@
 #include <linux/limits.h>
 #include <sys/types.h>
 #include <pwd.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <iostream>
+#include <map>
+#include <string>
+#include <array>
+#include <vector>
+#include <fstream>
+#include <filesystem>
+#include <stdio.h>
+#include <map>
+#include <pwd.h>
 
 using namespace std;
 
+namespace Utils {
 template<typename Type>
-    struct Result{
-        Type response;
-        int error;
+struct Result{
+    Type response;
+    int error;
 };
 
 struct Passwd {
@@ -31,3 +46,6 @@ std::vector<std::string> split(std::string text, char delim);
 unsigned short read_uid_min_max(string filename, string search);
 vector <string> pars_users();
 string read_passwd(string username);
+int synopsis_show(string str_link);
+}
+#endif
\ No newline at end of file
diff --git a/ubl-settings-bootloader.glade b/ubl-settings-bootloader.glade
index d6bcd4a..2066813 100644
--- a/ubl-settings-bootloader.glade
+++ b/ubl-settings-bootloader.glade
@@ -12,10 +12,10 @@
     <property name="resizable">False</property>
     <property name="modal">True</property>
     <property name="window-position">center</property>
-    <property name="icon-name">ubl-settings-datetime</property>
+    <property name="icon-name">ubl-settings-bootloader</property>
     <property name="type-hint">dialog</property>
     <property name="urgency-hint">True</property>
-    <property name="program-name">ubl-settings-datetime</property>
+    <property name="program-name">ubl-settings-bootloader</property>
     <property name="version">1.2</property>
     <property name="copyright" translatable="yes">Copyright © 2023 - UBSoft Software LLC</property>
     <property name="comments" translatable="yes">ubl-settings-bootloader</property>
@@ -387,7 +387,7 @@ specified priority</property>
                                         <property name="margin-end">5</property>
                                         <property name="margin-top">6</property>
                                         <property name="margin-bottom">6</property>
-                                        <property name="label" translatable="yes">Default download</property>
+                                        <property name="label" translatable="yes">Default load</property>
                                         <property name="ellipsize">start</property>
                                         <property name="xalign">0</property>
                                       </object>