diff --git a/firmware/shared_libs/controllers/ctrl_app.h b/firmware/shared_libs/controllers/ctrl_app.h
index 2338b89..9dc33bf 100644
--- a/firmware/shared_libs/controllers/ctrl_app.h
+++ b/firmware/shared_libs/controllers/ctrl_app.h
@@ -7,7 +7,7 @@ typedef struct
 {
     uint32_t frequency;
     uint16_t amplitude;
-    uint16_t offset;
+    int16_t offset;
     uint16_t phase;
     uint8_t duty;
     uint8_t enabled;
@@ -17,7 +17,7 @@ typedef struct
 {
     uint32_t frequency;
     uint16_t amplitude;
-    uint16_t offset;
+    int16_t offset;
     uint16_t phase;
     uint8_t wave;
     uint8_t enabled;
diff --git a/firmware/shared_libs/disp_layout/disp_layout.c b/firmware/shared_libs/disp_layout/disp_layout.c
index 418cd5b..575f3d3 100644
--- a/firmware/shared_libs/disp_layout/disp_layout.c
+++ b/firmware/shared_libs/disp_layout/disp_layout.c
@@ -5,6 +5,8 @@
 
 #include "disp_layout.h"
 
+#define abs(x) ((x) < 0 ? -(x) : (x))
+
 #define FREQ_MAX_DIGIT 7
 #define AMPL_MAX_DIGIT 3
 
@@ -34,10 +36,10 @@ static void _drawAmplValue(GFX_display_t *disp, uint16_t ampl, uint8_t pos_y)
     DISP_writeString(disp, &font5x7Info, data, 76, pos_y, BM_NORMAL);
 }
 
-static void _drawOffsValue(GFX_display_t *disp, uint16_t offs, uint8_t pos_y)
+static void _drawOffsValue(GFX_display_t *disp, int16_t offs, uint8_t pos_y)
 {
     uint8_t data[8];
-    snprintf((char *)data, 8, "%+01d.%02d V", offs / 100, offs % 100);
+    snprintf((char *)data, 8, "%+01d.%02d V", offs / 100, abs(offs) % 100);
     DISP_writeString(disp, &font5x7Info, data, 76, pos_y, BM_NORMAL);
 }
 
@@ -98,6 +100,7 @@ static void _drawButtons(GFX_display_t *disp, APP_data_t *app_data)
 static uint8_t _calcMarkePos(uint32_t value, uint32_t max)
 {
     return ((62 * value) + (max / 2)) / max;
+    // return (value < 0) ? ((62 * value) - (max / 2)) / max : ((62 * value) + (max / 2)) / max;
 }
 
 static uint8_t _sizeOfCharArray(char *array)
@@ -138,11 +141,11 @@ static void _drawAmplValueHelper(GFX_display_t *disp, uint32_t ampl, uint8_t foc
     DISP_drawBitmap(disp, &marker, marker_ampl_pos_x[(AMPL_MAX_DIGIT - 1) - focus_digit], 15, BM_NORMAL);
 }
 
-static void _drawOffsValueHelper(GFX_display_t *disp, uint32_t offs, uint8_t focus_digit)
+static void _drawOffsValueHelper(GFX_display_t *disp, int32_t offs, uint8_t focus_digit)
 {
     DISP_clearRegion(disp, 64, 13, 66, 40);
     DISP_writeString(disp, &font5x7Info, (uint8_t *)"O:", 64, 20, BM_NORMAL);
-    _drawAmplValue(disp, offs, 20);
+    _drawOffsValue(disp, offs, 20);
     DISP_drawBitmap(disp, &marker, marker_ampl_pos_x[(AMPL_MAX_DIGIT - 1) - focus_digit], 15, BM_NORMAL);
 }
 
@@ -150,7 +153,7 @@ static void _drawPhaseValueHelper(GFX_display_t *disp, uint32_t phase, uint8_t f
 {
     DISP_clearRegion(disp, 64, 13, 66, 40);
     DISP_writeString(disp, &font5x7Info, (uint8_t *)"P:", 64, 20, BM_NORMAL);
-    _drawAmplValue(disp, phase, 20);
+    _drawPhasValue(disp, phase, 20);
     DISP_drawBitmap(disp, &marker, marker_ampl_pos_x[(AMPL_MAX_DIGIT - 1) - focus_digit], 15, BM_NORMAL);
 }
 
@@ -168,8 +171,9 @@ static void _drawFuncGenValues(GFX_display_t *disp, APP_data_t *app_data)
         _drawMeterHelper(disp, "0V", "5V", _calcMarkePos(100, 500));
         break;
     case LAY_OFFS:
+        fun_gen->offset = -123;
         _drawOffsValueHelper(disp, fun_gen->offset, app_data->offs_focus_digit);
-        _drawMeterHelper(disp, "-5V", "+5V", _calcMarkePos(100, 500));
+        _drawMeterHelper(disp, "-5V", "+5V", _calcMarkePos(100 + 250, 500 + 250));
         break;
     case LAY_PHAS:
         _drawPhaseValueHelper(disp, fun_gen->phase, app_data->phas_focus_digit);