diff --git a/func/Module_precisely_align.py b/func/Module_precisely_align.py
index 674123a..3ce01d5 100644
--- a/func/Module_precisely_align.py
+++ b/func/Module_precisely_align.py
@@ -9,6 +9,7 @@ from PySide6.QtWidgets import QMessageBox, QMainWindow, QApplication, QButtonGro
 from matplotlib import gridspec, patches
 from matplotlib.backends.backend_qt import NavigationToolbar2QT
 from matplotlib.backends.backend_qtagg import FigureCanvasQTAgg
+from matplotlib.ticker import FuncFormatter
 from numpy import (diff, where, correlate, corrcoef, searchsorted, sum as np_sum, max as np_max, min as np_min, arange,
                    array,
                    append, delete, abs as np_abs, argmin as np_argmin, argmax as np_argmax, asarray)
@@ -470,6 +471,12 @@ class MainWindow_precisely_align(QMainWindow):
 
         sender = self.sender()
 
+        def offset_formatter(x, pos):
+            if self.data.BCG_early:
+                return f"{int(x + self.data.approximately_align_pos)}"
+            else:
+                return f"{int(x - self.data.approximately_align_pos)}"
+
         if sender == self.ui.pushButton_input:
             self.gs = gridspec.GridSpec(2, 1, height_ratios=[1, 1])
             self.fig.subplots_adjust(top=0.95, bottom=0.05, right=0.98, left=0.05, hspace=0.15, wspace=0)
@@ -528,6 +535,8 @@ class MainWindow_precisely_align(QMainWindow):
             self.ax0.stem(Jpeak, plot_element["JJIVs"],
                           markerfmt="C0.", linefmt=Constants.PLOT_COLOR_GREEN,
                           label=Constants.PRECISELY_ALIGN_PLOT_LABEL_JJIV)
+            self.ax0.xaxis.set_major_formatter(FuncFormatter(offset_formatter))
+
             self.ax1.stem(Rpeak, plot_element["RRIVs"],
                           markerfmt="C0.", linefmt=Constants.PLOT_COLOR_ORANGE,
                           label=Constants.PRECISELY_ALIGN_PLOT_LABEL_RRIV)