diff --git a/rfg_adc_plotter/gui/pyqtgraph_backend.py b/rfg_adc_plotter/gui/pyqtgraph_backend.py
index ce4c066..ce027ee 100644
--- a/rfg_adc_plotter/gui/pyqtgraph_backend.py
+++ b/rfg_adc_plotter/gui/pyqtgraph_backend.py
@@ -436,7 +436,7 @@ def resolve_distance_cut_start(
     distance_axis: Optional[np.ndarray],
     cut_percent: float,
 ) -> Optional[float]:
-    """Return distance threshold for hiding the beginning of FFT/B-scan axis."""
+    """Return distance threshold for hiding the beginning of the FFT line axis."""
     if distance_axis is None:
         return None
     axis_arr = np.asarray(distance_axis, dtype=np.float64).reshape(-1)
@@ -1065,7 +1065,7 @@ def run_pyqtgraph(args) -> None:
     fft_mode_combo.addItem("Симметричный", "symmetric")
     fft_mode_combo.addItem("Нули [-max,+min]", "positive_only")
     fft_mode_combo.addItem("Нули [-max,+min] точный", "positive_only_exact")
-    fft_low_cut_label = QtWidgets.QLabel("Срез начала FFT/B-scan")
+    fft_low_cut_label = QtWidgets.QLabel("Срез начала FFT")
     fft_low_cut_slider = QtWidgets.QSlider(QtCore.Qt.Horizontal)
     fft_low_cut_slider.setRange(0, int(FFT_LOW_CUT_MAX_PERCENT * FFT_LOW_CUT_SLIDER_SCALE))
     fft_low_cut_slider.setValue(0)
@@ -1501,20 +1501,22 @@ def run_pyqtgraph(args) -> None:
 
         distance_bounds = resolve_axis_bounds(runtime.ring.distance_axis)
         if distance_bounds is not None:
-            d_min, d_max = distance_bounds
-            d_cut = _active_distance_cut_start()
-            if d_cut is not None and np.isfinite(d_cut):
-                d_min = max(float(d_min), float(d_cut))
-            span = max(1e-9, float(d_max - d_min))
-            set_image_rect_if_changed("fft_waterfall_rect", img_fft, 0.0, d_min, float(max_sweeps), span)
+            d_min_full, d_max = distance_bounds
+            span = max(1e-9, float(d_max - d_min_full))
+            set_image_rect_if_changed("fft_waterfall_rect", img_fft, 0.0, d_min_full, float(max_sweeps), span)
             set_xy_range_if_changed(
                 "fft_waterfall_range",
                 p_spec,
                 x_bounds=(0, max_sweeps - 1),
-                y_bounds=(d_min, d_max),
+                y_bounds=(d_min_full, d_max),
                 padding=0,
             )
-            set_x_range_if_changed("fft_x", p_fft, d_min, d_max, padding=0)
+
+            d_min_fft = d_min_full
+            d_cut = _active_distance_cut_start()
+            if d_cut is not None and np.isfinite(d_cut):
+                d_min_fft = max(float(d_min_fft), float(d_cut))
+            set_x_range_if_changed("fft_x", p_fft, d_min_fft, d_max, padding=0)
         refresh_fft_low_cut_label()
 
     def resolve_curve_xs(size: int) -> np.ndarray:
@@ -3419,12 +3421,7 @@ def run_pyqtgraph(args) -> None:
                     disp_fft_lin = disp_fft_lin[:row_take, :]
                     if active_background is not None:
                         active_background = active_background[:row_take]
-                    fft_cut_start = _active_distance_cut_start()
-                    axis_arr, keep_mask = apply_distance_cut_to_axis(axis_arr, fft_cut_start)
-                    if keep_mask.size > 0:
-                        disp_fft_lin = disp_fft_lin[keep_mask, :]
-                        if active_background is not None and active_background.size == keep_mask.size:
-                            active_background = active_background[keep_mask]
+                    # B-scan must show the full distance range; the low-cut slider only crops the FFT line plot.
                     disp_fft_axis = axis_arr
                 disp_fft_axis, disp_fft_lin, display_row_idx = decimate_bscan_rows_for_display(
                     disp_fft_axis,