diff --git a/src/plugins/logfile/filterwidget.py b/src/plugins/logfile/filterwidget.py
index 5c0a05d..eda73e1 100644
--- a/src/plugins/logfile/filterwidget.py
+++ b/src/plugins/logfile/filterwidget.py
@@ -68,12 +68,19 @@ class FilterTask(QRunnable):
             last_progress_report = time.time()
             try:
                 with open(self.source_model.get_file(), "rb") as source:
+                    source.seek(self.source_model.range_start)
+                    source_position = source.tell()
                     with open(self.filter_model.get_file(), "w+b") as target:
                         line_count = 0
                         lines_written = 0
                         while line_encoded := source.readline():
+                            if 0 < self.source_model.range_end < source_position:
+                                break
+
                             line_count = line_count + 1
+
                             line = line_encoded.decode("utf8", errors="ignore")
+                            source_position = source_position + len(line_encoded)
 
                             if self.regex.findall(line):
                                 lines_written = lines_written + 1
diff --git a/src/ui/bigtext/bigtext.py b/src/ui/bigtext/bigtext.py
index b5d5416..8956733 100644
--- a/src/ui/bigtext/bigtext.py
+++ b/src/ui/bigtext/bigtext.py
@@ -170,6 +170,8 @@ class InnerBigText(QWidget):
         self._range_start = range_start
         self._range_end = range_end
 
+        self.model.setRange(range_start, range_end)
+
         self._v_scaled_scrollbar.setMinimum(max(0, self._range_start))
         self._v_scaled_scrollbar.setMaximum(min(self._v_scaled_scrollbar.maximum(), range_end))
 
diff --git a/src/ui/bigtext/logFileModel.py b/src/ui/bigtext/logFileModel.py
index 6d06b98..eadce9f 100644
--- a/src/ui/bigtext/logFileModel.py
+++ b/src/ui/bigtext/logFileModel.py
@@ -18,6 +18,9 @@ class LogFileModel:
 
     _file_size = -1
 
+    range_start = 0
+    range_end = -1
+
     def __init__(self, file: str, settings: Settings):
         self.settings = settings
         self._file = os.path.realpath(file)
@@ -31,6 +34,10 @@ class LogFileModel:
     def __str__(self):
         return self._file
 
+    def setRange(self, range_start: int, range_end: int):
+        self.range_start = range_start
+        self.range_end = range_end
+
     def get_query_highlight(self) -> Optional[HighlightRegex]:
         if not self.settings.session.getboolean("general", "highlight_search_term"):
             return None