diff --git a/src/libslic3r/AppConfig.cpp b/src/libslic3r/AppConfig.cpp
index 7aad4666a8..9d2cb256ab 100644
--- a/src/libslic3r/AppConfig.cpp
+++ b/src/libslic3r/AppConfig.cpp
@@ -284,6 +284,10 @@ void AppConfig::set_defaults()
     if (get("mouse_wheel").empty()) {
         set("mouse_wheel", "0");
     }
+    
+    if (get("max_recent_count").empty()) {
+        set("max_recent_count", "18");
+    }
 
     if (get("staff_pick_switch").empty()) {
         set_bool("staff_pick_switch", true);
diff --git a/src/slic3r/GUI/MainFrame.cpp b/src/slic3r/GUI/MainFrame.cpp
index fe490c1053..8b0cbc3c42 100644
--- a/src/slic3r/GUI/MainFrame.cpp
+++ b/src/slic3r/GUI/MainFrame.cpp
@@ -178,6 +178,10 @@ DPIFrame(NULL, wxID_ANY, "", wxDefaultPosition, wxDefaultSize, BORDERLESS_FRAME_
 
     wxGetApp().app_config->set_bool("dump_video", false);
 
+    wxString max_recent_count_str = wxGetApp().app_config->get("max_recent_count");
+    long max_recent_count = 18;
+    if (max_recent_count_str.ToLong(&max_recent_count))
+        set_max_recent_count((int)max_recent_count);
 
     //reset log level
     auto loglevel = wxGetApp().app_config->get("severity_level");
@@ -2498,6 +2502,23 @@ void MainFrame::show_publish_button(bool show)
     }
 }
 
+void MainFrame::set_max_recent_count(int max)
+{
+    max = max < 0 ? 0 : max > 10000 ? 10000 : max;
+    size_t count = m_recent_projects.GetCount();
+    m_recent_projects.SetMaxFiles(max);
+    if (count != m_recent_projects.GetCount()) {
+        count = m_recent_projects.GetCount();
+        std::vector<std::string> recent_projects;
+        for (size_t i = 0; i < count; ++i) {
+            recent_projects.push_back(into_u8(m_recent_projects.GetHistoryFile(i)));
+        }
+        wxGetApp().app_config->set_recent_projects(recent_projects);
+        wxGetApp().app_config->save();
+        m_webview->SendRecentList("");
+    }
+}
+
 void MainFrame::open_menubar_item(const wxString& menu_name,const wxString& item_name)
 {
     if (m_menubar == nullptr)
@@ -3007,6 +3028,14 @@ void MainFrame::FileHistory::LoadThumbnails()
     m_load_called = true;
 }
 
+inline void MainFrame::FileHistory::SetMaxFiles(int max)
+{
+    m_fileMaxFiles  = max;
+    size_t numFiles = m_fileHistory.size();
+    while (numFiles > m_fileMaxFiles)
+        RemoveFileFromHistory(--numFiles);
+}
+
 void MainFrame::get_recent_projects(boost::property_tree::wptree &tree)
 {
     for (size_t i = 0; i < m_recent_projects.GetCount(); ++i) {
diff --git a/src/slic3r/GUI/MainFrame.hpp b/src/slic3r/GUI/MainFrame.hpp
index 58ed9314c4..437a9079cb 100644
--- a/src/slic3r/GUI/MainFrame.hpp
+++ b/src/slic3r/GUI/MainFrame.hpp
@@ -154,6 +154,8 @@ class MainFrame : public DPIFrame
         size_t FindFileInHistory(const wxString &file);
 
         void LoadThumbnails();
+
+        void SetMaxFiles(int max);
     private:
         std::deque<std::string> m_thumbnails;
         bool m_load_called = false;
@@ -243,6 +245,7 @@ public:
 
     void        update_title();
     void        show_publish_button(bool show);
+    void        set_max_recent_count(int max);
 
 	void        update_title_colour_after_set_title();
     void        show_option(bool show);
diff --git a/src/slic3r/GUI/Preferences.cpp b/src/slic3r/GUI/Preferences.cpp
index 6a4eaaa45b..fac62a3f54 100644
--- a/src/slic3r/GUI/Preferences.cpp
+++ b/src/slic3r/GUI/Preferences.cpp
@@ -378,6 +378,51 @@ wxBoxSizer *PreferencesDialog::create_item_multiple_combobox(
     return m_sizer_tcombox;
 }
 
+wxBoxSizer *PreferencesDialog::create_item_input(wxString title, wxString title2, wxWindow *parent, wxString tooltip, std::string param, std::function<void(wxString)> onchange)
+{
+    wxBoxSizer *sizer_input = new wxBoxSizer(wxHORIZONTAL);
+    auto        input_title   = new wxStaticText(parent, wxID_ANY, title);
+    input_title->SetForegroundColour(DESIGN_GRAY900_COLOR);
+    input_title->SetFont(::Label::Body_13);
+    input_title->SetToolTip(tooltip);
+    input_title->Wrap(-1);
+
+    auto       input = new ::TextInput(parent, wxEmptyString, wxEmptyString, wxEmptyString, wxDefaultPosition, DESIGN_INPUT_SIZE, wxTE_PROCESS_ENTER);
+    StateColor input_bg(std::pair<wxColour, int>(wxColour("#F0F0F1"), StateColor::Disabled), std::pair<wxColour, int>(*wxWHITE, StateColor::Enabled));
+    input->SetBackgroundColor(input_bg);
+    input->GetTextCtrl()->SetValue(app_config->get(param));
+
+    auto second_title = new wxStaticText(parent, wxID_ANY, title2, wxDefaultPosition, DESIGN_TITLE_SIZE, 0);
+    second_title->SetForegroundColour(DESIGN_GRAY900_COLOR);
+    second_title->SetFont(::Label::Body_13);
+    second_title->SetToolTip(tooltip);
+    second_title->Wrap(-1);
+
+    sizer_input->Add(0, 0, 0, wxEXPAND | wxLEFT, 23);
+    sizer_input->Add(input_title, 0, wxALIGN_CENTER_VERTICAL | wxALL, 3);
+    sizer_input->Add(input, 0, wxALIGN_CENTER_VERTICAL, 0);
+    sizer_input->Add(0, 0, 0, wxEXPAND | wxLEFT, 3);
+    sizer_input->Add(second_title, 0, wxALIGN_CENTER_VERTICAL | wxALL, 3);
+
+    input->GetTextCtrl()->Bind(wxEVT_TEXT_ENTER, [this, param, input, onchange](wxCommandEvent &e) {
+        auto value = input->GetTextCtrl()->GetValue();
+        app_config->set(param, std::string(value.mb_str()));
+        app_config->save();
+        onchange(value);
+        e.Skip();
+    });
+
+    input->GetTextCtrl()->Bind(wxEVT_KILL_FOCUS, [this, param, input, onchange](wxFocusEvent &e) {
+        auto value = input->GetTextCtrl()->GetValue();
+        app_config->set(param, std::string(value.mb_str()));
+        app_config->save();
+        onchange(value);
+        e.Skip();
+    });
+
+    return sizer_input;
+}
+
 wxBoxSizer *PreferencesDialog::create_item_backup_input(wxString title, wxWindow *parent, wxString tooltip, std::string param)
 {
     wxBoxSizer *m_sizer_input = new wxBoxSizer(wxHORIZONTAL);
@@ -400,10 +445,10 @@ wxBoxSizer *PreferencesDialog::create_item_backup_input(wxString title, wxWindow
     second_title->Wrap(-1);
 
     m_sizer_input->Add(0, 0, 0, wxEXPAND | wxLEFT, 23);
-    m_sizer_input->Add(input_title, 0, wxALIGN_CENTER | wxALL, 3);
-    m_sizer_input->Add(input, 0, wxALIGN_CENTER, 0);
+    m_sizer_input->Add(input_title, 0, wxALIGN_CENTER_VERTICAL | wxALL, 3);
+    m_sizer_input->Add(input, 0, wxALIGN_CENTER_VERTICAL, 0);
     m_sizer_input->Add(0, 0, 0, wxEXPAND | wxLEFT, 3);
-    m_sizer_input->Add(second_title, 0, wxALIGN_CENTER| wxALL, 3);
+    m_sizer_input->Add(second_title, 0, wxALIGN_CENTER_VERTICAL | wxALL, 3);
 
 
     input->GetTextCtrl()->Bind(wxEVT_COMMAND_TEXT_UPDATED, [this, param, input](wxCommandEvent &e) {
@@ -856,10 +901,15 @@ wxWindow* PreferencesDialog::create_general_page()
     auto item_modelmall = create_item_checkbox(_L("Show staff-picks"), page, _L("Show staff-picks"), 50, "staff_pick_switch");
 
 
-    auto title_backup = create_item_title(_L("Backup"), page, _L("Backup"));
-    //auto item_backup = create_item_switch(_L("Backup switch"), page, _L("Backup switch"), "units");
-    auto item_backup  = create_item_checkbox(_L("Auto-Backup"), page,_L("Auto-Backup"), 50, "backup_switch");
-    auto item_backup_interval = create_item_backup_input(_L("Backup interval"), page, _L("Backup interval"), "backup_interval");
+    auto title_project = create_item_title(_L("Project"), page, "");
+    auto item_max_recent_count = create_item_input(_L("Maximum recent projects"), "", page, _L("Maximum count of recent projects"), "max_recent_count", [](wxString value) {
+        long max = 0;
+        if (value.ToLong(&max))
+            wxGetApp().mainframe->set_max_recent_count(max);
+    });
+    // auto item_backup = create_item_switch(_L("Backup switch"), page, _L("Backup switch"), "units");
+    auto item_backup  = create_item_checkbox(_L("Auto-Backup"), page,_L("Backup your project periodically for restoring from the occasional crash."), 50, "backup_switch");
+    auto item_backup_interval = create_item_backup_input(_L("every"), page, _L("The peroid of backup in seconds."), "backup_interval");
 
     //downloads
     auto title_downloads = create_item_title(_L("Downloads"), page, _L("Downloads"));
@@ -888,9 +938,10 @@ wxWindow* PreferencesDialog::create_general_page()
     sizer_page->Add(title_modelmall, 0, wxTOP | wxEXPAND, FromDIP(20));
     sizer_page->Add(item_modelmall, 0, wxTOP, FromDIP(3));
 
-    sizer_page->Add(title_backup, 0, wxTOP| wxEXPAND, FromDIP(20));
+    sizer_page->Add(title_project, 0, wxTOP| wxEXPAND, FromDIP(20));
+    sizer_page->Add(item_max_recent_count, 0, wxTOP, FromDIP(3));
     sizer_page->Add(item_backup, 0, wxTOP,FromDIP(3));
-    sizer_page->Add(item_backup_interval, 0, wxTOP, FromDIP(3));
+    item_backup->Add(item_backup_interval, 0, wxLEFT, 0);
 
     sizer_page->Add(title_downloads, 0, wxTOP| wxEXPAND, FromDIP(20));
     sizer_page->Add(item_downloads, 0, wxEXPAND, FromDIP(3));
diff --git a/src/slic3r/GUI/Preferences.hpp b/src/slic3r/GUI/Preferences.hpp
index cd497110d3..bfe3c98cde 100644
--- a/src/slic3r/GUI/Preferences.hpp
+++ b/src/slic3r/GUI/Preferences.hpp
@@ -111,7 +111,7 @@ public:
     wxBoxSizer *create_item_darkmode_checkbox(wxString title, wxWindow *parent, wxString tooltip, int padding_left, std::string param);
     void set_dark_mode();
     wxWindow* create_item_downloads(wxWindow* parent, int padding_left, std::string param);
-    wxBoxSizer* create_item_backup_checkbox(wxString title, wxWindow* parent, wxString tooltip, int padding_left, std::string param);
+    wxBoxSizer *create_item_input(wxString title, wxString title2, wxWindow *parent, wxString tooltip, std::string param, std::function<void(wxString)> onchange = {});
     wxBoxSizer *create_item_backup_input(wxString title, wxWindow *parent, wxString tooltip, std::string param);
     wxBoxSizer *create_item_multiple_combobox(
         wxString title, wxWindow *parent, wxString tooltip, int padding_left, std::string parama, std::vector<wxString> vlista, std::vector<wxString> vlistb);