diff --git a/src/gui_qt/_py/integral_widget.py b/src/gui_qt/_py/integral_widget.py
index 81ba165..0d5e015 100644
--- a/src/gui_qt/_py/integral_widget.py
+++ b/src/gui_qt/_py/integral_widget.py
@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
 
-# Form implementation generated from reading ui file '/autohome/dominik/nmreval/src/resources/_ui/integral_widget.ui'
+# Form implementation generated from reading ui file 'src/resources/_ui/integral_widget.ui'
 #
-# Created by: PyQt5 UI code generator 5.15.4
+# Created by: PyQt5 UI code generator 5.15.9
 #
 # WARNING: Any manual changes made to this file will be lost when pyuic5 is
 # run again.  Do not edit this file unless you know what you are doing.
@@ -26,7 +26,6 @@ class Ui_Form(object):
         self.set_combobox.setObjectName("set_combobox")
         self.verticalLayout.addWidget(self.set_combobox)
         self.treeWidget = QtWidgets.QTreeWidget(Form)
-        self.treeWidget.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
         self.treeWidget.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
         self.treeWidget.setHeaderHidden(True)
         self.treeWidget.setObjectName("treeWidget")
diff --git a/src/gui_qt/data/integral_widget.py b/src/gui_qt/data/integral_widget.py
index baeaa90..ea938ac 100644
--- a/src/gui_qt/data/integral_widget.py
+++ b/src/gui_qt/data/integral_widget.py
@@ -42,6 +42,8 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
         self.max_y = inf
         self.min_y = -inf
 
+        self.treeWidget.itemChanged.connect(self._update_by_tree)
+
     def __call__(self, graph_name, items):
         self.label_2.setText(f'Connected to {graph_name}\nChanging tab will remove all integration limits.')
 
@@ -77,7 +79,6 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
         for idx, rnge in enumerate(self.ranges):
             self._update_values(idx, rnge)
 
-
     def add(self, pos):
         x = pos[0]
         self.ranges.append((x, x*1.1))
@@ -108,7 +109,10 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
         item_list = []
         for text, val in [('Start', pts_i[0]), ('Stop', pts_i[1]), ('Areas', 0), ('Ratio', 1.)]:
             child = QtWidgets.QTreeWidgetItem()
-            child.setFlags(QtCore.Qt.NoItemFlags)
+            if text.startswith('S'):
+                child.setFlags(child.flags() | QtCore.Qt.ItemIsEditable)
+            else:
+                child.setFlags(QtCore.Qt.NoItemFlags)
             child.setText(0, f'{text}: {val:.5g}')
             child.setForeground(0, QtGui.QBrush(QtGui.QColor('black')))
 
@@ -121,8 +125,27 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
 
         self._update_values(len(self.ranges) - 1, pts_i)
 
+    def _update_by_tree(self, item: QtWidgets.QTreeWidgetItem) -> None:
+        parent_item = item.parent()
+        idx = self.treeWidget.invisibleRootItem().indexOfChild(parent_item)
+
+        is_left_border = parent_item.indexOfChild(item) == 0
+        current_region = self.lines[idx][0]
+        current_limits = current_region.getRegion()
+
+        new_value = item.text(0)
+        try:
+            new_value = float(new_value)
+            if is_left_border:
+                current_region.setRegion((new_value, current_limits[1]))
+            else:
+                current_region.setRegion((current_limits[0], new_value))
+        except ValueError:
+            self._update_values(idx, current_limits)
+
     def _update_integral(self):
         idx = None
+        reg = None
         sender = self.sender()
         for i, (reg, _) in enumerate(self.lines):
             if sender == reg:
@@ -132,19 +155,20 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
         if idx is None:
             return
 
-        self._update_values(idx, sender.getRegion())
+        self._update_values(idx, reg.getRegion())
 
     def _update_values(self, idx, new_range):
         self.ranges[idx] = new_range
 
         area = self.make_integral(idx, *new_range)
 
+        self.treeWidget.blockSignals(True)
+
         item = self.treeWidget.topLevelItem(idx)
         item.child(0).setText(0, f'Start: {new_range[0]:.5g}')
         item.child(1).setText(0, f'Stop: {new_range[1]:.5g}')
 
         if area is not None:
-            self.areas[idx] = area
             item.child(2).setText(0, f'Area: {area:.5g}')
             if self.max_area > 0:
                 self._set_ratios(idx, self.max_area)
@@ -157,9 +181,12 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
                     self._set_ratios(i, curr_max)
             self.max_area = curr_max
 
+        self.treeWidget.blockSignals(False)
+
     def _set_ratios(self, idx, max_value):
         item = self.treeWidget.invisibleRootItem().child(idx)
         area_i = self.areas[idx]
+
         item.child(3).setText(0, f'Ratio: {area_i / max_value:.3g}')
 
         integral_line = self.lines[idx][1]
@@ -176,7 +203,9 @@ class IntegralWidget(QtWidgets.QWidget, Ui_Form):
         if integral.size != 0:
             area = integral[-1, 1]
             scale = (self.max_y-self.min_y) / area
-            self.lines[idx][1].setData(x=integral[:, 0], y=integral[:, 1]*scale  + self.min_y)
+            self.lines[idx][1].setData(x=integral[:, 0], y=integral[:, 1]*scale + self.min_y)
+
+            self.areas[idx] = area
 
             return area
 
diff --git a/src/resources/_ui/integral_widget.ui b/src/resources/_ui/integral_widget.ui
index 9569a7e..23f95b1 100644
--- a/src/resources/_ui/integral_widget.ui
+++ b/src/resources/_ui/integral_widget.ui
@@ -41,9 +41,6 @@
    </item>
    <item>
     <widget class="QTreeWidget" name="treeWidget">
-     <property name="editTriggers">
-      <set>QAbstractItemView::NoEditTriggers</set>
-     </property>
      <property name="selectionBehavior">
       <enum>QAbstractItemView::SelectRows</enum>
      </property>