diff --git a/CMakeLists.txt b/CMakeLists.txt
index 99d5c09..cd11b9c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,6 +25,7 @@ add_executable(zavlaha
     src/screens/screen_settings.c
     src/screens/screen_cyklus.c
     src/screens/screen_set_time.c
+    src/screens/screen_set_moisture_threshold.c
     src/app_io.c
     src/app_config.c)
 
diff --git a/src/screens/app_gui.h b/src/screens/app_gui.h
index 3eb8c0d..f7baf6d 100644
--- a/src/screens/app_gui.h
+++ b/src/screens/app_gui.h
@@ -49,8 +49,10 @@ void request_paint();
 
 void screen_home(GuiEvent event);
 void screen_cyklus(GuiEvent event);
+extern struct AppConfig settings_scratch;
 void screen_settings(GuiEvent event);
 void screen_set_time(GuiEvent event);
+void screen_set_moisture_threshold(GuiEvent event);
 // XXX other prototypes
 
 struct State {
diff --git a/src/screens/screen_set_moisture_threshold.c b/src/screens/screen_set_moisture_threshold.c
new file mode 100644
index 0000000..1bad130
--- /dev/null
+++ b/src/screens/screen_set_moisture_threshold.c
@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include "app_gui.h"
+#include "gui_event.h"
+#include "ds_rtc.h"
+#include "app_io.h"
+#include "lcd.h"
+#include "app_config.h"
+
+static int threshold;
+static int cursor;
+
+void screen_set_moisture_threshold(GuiEvent event)
+{
+    char buf[100];
+
+    switch (event) {
+        case GUI_EVENT_SCREEN_INIT:
+            threshold = 0;
+            cursor = 0;
+            break;
+
+        case GUI_EVENT_PAINT:
+            LcdBuffer_Write(&lcd, 0, 0, "Blokuj zálivku pokud");
+            LcdBuffer_Write(&lcd, 1, 0, "je vlhkost vyšší než");
+
+            LcdBuffer_SetCursor(&lcd, 2, cursor, (cursor < 3) ? CURSOR_BOTH : CURSOR_NONE);
+
+            if (cursor > 0) {
+                snprintf(buf, 100, "%d %%", threshold);
+                LcdBuffer_Write(&lcd, 2, 0, buf);
+            } else {
+                LcdBuffer_Write(&lcd, 2, 0, "  %");
+            }
+
+            LcdBuffer_Write(&lcd, 3, 0, cursor == 0 ? "🅳Zrušit" : "🅳Zrušit 🅰Uložit");
+            break;
+
+        case GUI_EVENT_KEY_A: // Confirm
+            if (cursor > 0) {
+                settings_scratch.moisture_threshold_percent = threshold;
+                switch_screen(screen_settings, false);
+            }
+            break;
+
+        case GUI_EVENT_KEY_D: // CANCEL
+            switch_screen(screen_settings, false);
+            break;
+
+        default:
+            if (event >= '0' && event <= '9') {
+                int digit = event - '0';
+                int th2 = threshold * 10 + digit;
+                if (th2 <= 100) {
+                    threshold = th2;
+                    cursor++;
+                    request_paint();
+                }
+            }
+    }
+}
diff --git a/src/screens/screen_set_time.c b/src/screens/screen_set_time.c
index 399bb5a..803802b 100644
--- a/src/screens/screen_set_time.c
+++ b/src/screens/screen_set_time.c
@@ -28,12 +28,14 @@ void screen_set_time(GuiEvent event)
             snprintf(buf, 100, "%02d:%02d", time.hour, time.minute);
             LcdBuffer_Write(&lcd, 1, 0, buf);
 
-            LcdBuffer_Write(&lcd, 3, 0, "🅰Uložit 🅳Zrušit");
+            LcdBuffer_Write(&lcd, 3, 0, cursor < 4 ? "🅳Zrušit" : "🅳Zrušit 🅰Uložit");
             break;
 
         case GUI_EVENT_KEY_A: // Confirm
-            rtc_set_time(&time);
-            switch_screen(screen_settings, false);
+            if (cursor == 4) {
+                rtc_set_time(&time);
+                switch_screen(screen_settings, false);
+            }
             break;
 
         case GUI_EVENT_KEY_D: // CANCEL
diff --git a/src/screens/screen_settings.c b/src/screens/screen_settings.c
index 5d0703f..16a15ff 100644
--- a/src/screens/screen_settings.c
+++ b/src/screens/screen_settings.c
@@ -17,7 +17,7 @@ static int page = 1;
 
 #define PAGECOUNT 3
 
-static struct AppConfig scratch;
+struct AppConfig settings_scratch;
 
 /** Clear the top 3 lines in the LCD - this fixes some problems with utf8 allocations
  * (char still held by a line later overwritten) */
@@ -29,13 +29,13 @@ void screen_settings(GuiEvent event)
     switch (event) {
         case GUI_EVENT_SCREEN_INIT:
             page = 1;
-            memcpy(&scratch, &app_config, APPCONFIG_SIZE);
+            memcpy(&settings_scratch, &app_config, APPCONFIG_SIZE);
             break;
 
         case GUI_EVENT_PAINT:
             switch (page) {
                 case 1:
-                    snprintf(buf, 100, "1. Program=%s", scratch.scheduler_enable ? "ZAP" : "VYP");
+                    snprintf(buf, 100, "1. Program=%s", settings_scratch.scheduler_enable ? "ZAP" : "VYP");
                     LcdBuffer_Write(&lcd, 0, 0, buf);
                     LcdBuffer_Write(&lcd, 1, 0, "2. Upravit program");
                     LcdBuffer_Write(&lcd, 2, 0, "3. Nastavit čas");
@@ -47,14 +47,15 @@ void screen_settings(GuiEvent event)
                     break;
 
                 case 3:
-                    snprintf(buf, 100, "1. Blok.vlhkostí=%s", scratch.moisture_enable ? "ZAP" : "VYP");
+                    snprintf(buf, 100, "1. Blok.vlhkostí=%s", settings_scratch.moisture_enable ? "ZAP" : "VYP");
                     LcdBuffer_Write(&lcd, 0, 0, buf);
                     LcdBuffer_Write(&lcd, 1, 0, "2. Kalibrace vlhkom.");
-                    LcdBuffer_Write(&lcd, 2, 0, "3. Nastavit práh");
+                    snprintf(buf, 100, "3. Práh vlh.=%d%%", settings_scratch.moisture_threshold_percent);
+                    LcdBuffer_Write(&lcd, 2, 0, buf);
                     break;
             }
 
-            snprintf(buf, 100, "⊛←%d/%d→¤ 🅰Ulož 🅳Zruš", page, PAGECOUNT);
+            snprintf(buf, 100, "⊛←%d/%d→¤ 🅳Zruš 🅰Ulož", page, PAGECOUNT);
             LcdBuffer_Write(&lcd, 3, 0, buf);
             break;
 
@@ -77,7 +78,7 @@ void screen_settings(GuiEvent event)
             break;
 
         case GUI_EVENT_KEY_A: // SAVE
-            memcpy(&app_config, &scratch, APPCONFIG_SIZE);
+            memcpy(&app_config, &settings_scratch, APPCONFIG_SIZE);
             appconfig_save();
             switch_screen(screen_home, true);
             break;
@@ -91,7 +92,7 @@ void screen_settings(GuiEvent event)
                 case 1:
                     switch (event) {
                         case GUI_EVENT_KEY_1: // Program Zap/VYP
-                            scratch.scheduler_enable ^= 1;
+                            settings_scratch.scheduler_enable ^= 1;
                             request_paint();
                             break;
 
@@ -119,7 +120,7 @@ void screen_settings(GuiEvent event)
                 case 3:
                     switch (event) {
                         case GUI_EVENT_KEY_1: // Blokace vlhkosti Zap/VYP
-                            scratch.moisture_enable ^= 1;
+                            settings_scratch.moisture_enable ^= 1;
                             request_paint();
                             break;
 
@@ -128,7 +129,7 @@ void screen_settings(GuiEvent event)
                             break;
 
                         case GUI_EVENT_KEY_3: // Nastavit prah
-                            // TODO
+                            switch_screen(screen_set_moisture_threshold, true);
                             break;
                     }
                     break;