diff --git a/fixtracks/widgets/selection_control.py b/fixtracks/widgets/selection_control.py
index a057e05..b1edcde 100644
--- a/fixtracks/widgets/selection_control.py
+++ b/fixtracks/widgets/selection_control.py
@@ -4,7 +4,7 @@ import numpy as np
 from PySide6.QtCore import Qt, Signal, QSize
 from PySide6.QtGui import QFont
 from PySide6.QtWidgets import QWidget, QLabel, QPushButton, QSizePolicy
-from PySide6.QtWidgets import QGridLayout, QVBoxLayout
+from PySide6.QtWidgets import QGridLayout, QVBoxLayout, QApplication
 
 from fixtracks.utils.styles import pushBtnStyle
 
@@ -15,6 +15,7 @@ class SelectionControls(QWidget):
     assignTwo = Signal()
     assignOther = Signal()
     accept = Signal()
+    accept_until = Signal()
     unaccept = Signal()
     delete = Signal()
     revertall = Signal()
@@ -102,7 +103,7 @@ class SelectionControls(QWidget):
         acceptBtn.setFont(font)
         acceptBtn.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
         acceptBtn.setStyleSheet(pushBtnStyle("darkgray"))
-        acceptBtn.setToolTip(f"Accept assignments of current selection as TRUE")
+        acceptBtn.setToolTip(f"Accept assignments of current selection as TRUE, Hold shift while clicking to accept all until here.")
         acceptBtn.clicked.connect(self.on_Accept)
 
         unacceptBtn = QPushButton("un-accept")
@@ -210,7 +211,12 @@ class SelectionControls(QWidget):
 
     def on_Accept(self):
         logging.debug("SelectionControl: accept AssignmentBtn")
-        self.accept.emit()
+        modifiers = QApplication.keyboardModifiers()
+        if modifiers == Qt.KeyboardModifier.ShiftModifier:
+            logging.debug("Shift key was pressed during accept")
+            self.accept_until.emit()
+        else:
+            self.accept.emit()
 
     def on_Unaccept(self):
         logging.debug("SelectionControl: revoke user assignmentBtn")
diff --git a/fixtracks/widgets/tracks.py b/fixtracks/widgets/tracks.py
index 7bad24b..44bf044 100644
--- a/fixtracks/widgets/tracks.py
+++ b/fixtracks/widgets/tracks.py
@@ -74,6 +74,7 @@ class FixTracks(QWidget):
         self._controls_widget.fwd.connect(self.on_forward)
         self._controls_widget.back.connect(self.on_backward)
         self._controls_widget.accept.connect(self.on_setUserFlag)
+        self._controls_widget.accept_until.connect(self.on_setUserFlagsUntil)
         self._controls_widget.unaccept.connect(self.on_unsetUserFlag)
         self._controls_widget.delete.connect(self.on_deleteDetection)
         self._controls_widget.revertall.connect(self.on_revertUserFlags)
@@ -267,6 +268,12 @@ class FixTracks(QWidget):
         self._timeline.update()
         self.update()
 
+    def on_setUserFlagsUntil(self):
+        self._data.setSelectionRange("frame", 0, self._currentWindowPos + self._currentWindowWidth)
+        self._data.setUserLabeledStatus(True)
+        self._timeline.update()
+        self.update()
+
     def on_unsetUserFlag(self):
         logging.debug("Tracks:unsetUserFlag")
         self._data.setUserLabeledStatus(False)