diff --git a/tools/cabana/dbc/dbc.cc b/tools/cabana/dbc/dbc.cc
index 909390fd27..e404bde99c 100644
--- a/tools/cabana/dbc/dbc.cc
+++ b/tools/cabana/dbc/dbc.cc
@@ -13,6 +13,30 @@ std::vector<const cabana::Signal*> cabana::Msg::getSignals() const {
   return ret;
 }
 
+void cabana::Msg::updateMask() {
+  mask.clear();
+  for (int i = 0; i < size; i++) {
+    mask.push_back(0x00);
+  }
+
+  for (auto &sig : sigs) {
+    int i = sig.msb / 8;
+    int bits = sig.size;
+    while (i >= 0 && i < size && bits > 0) {
+      int lsb = (int)(sig.lsb / 8) == i ? sig.lsb : i * 8;
+      int msb = (int)(sig.msb / 8) == i ? sig.msb : (i + 1) * 8 - 1;
+
+      int sz = msb - lsb + 1;
+      int shift = (lsb - (i * 8));
+
+      mask[i] |= ((1ULL << sz) - 1) << shift;
+
+      bits -= size;
+      i = sig.is_little_endian ? i - 1 : i + 1;
+    }
+  }
+}
+
 void cabana::Signal::updatePrecision() {
   precision = std::max(num_decimals(factor), num_decimals(offset));
 }
diff --git a/tools/cabana/dbc/dbc.h b/tools/cabana/dbc/dbc.h
index fdbbc9d169..be0057cf56 100644
--- a/tools/cabana/dbc/dbc.h
+++ b/tools/cabana/dbc/dbc.h
@@ -65,6 +65,9 @@ namespace cabana {
     uint32_t size;
     QList<cabana::Signal> sigs;
 
+    QList<uint8_t> mask;
+    void updateMask();
+
     std::vector<const cabana::Signal*> getSignals() const;
     const cabana::Signal *sig(const QString &sig_name) const {
         auto it = std::find_if(sigs.begin(), sigs.end(), [&](auto &s) { return s.name == sig_name; });
diff --git a/tools/cabana/dbc/dbcfile.cc b/tools/cabana/dbc/dbcfile.cc
index 0534ce39ff..9173080796 100644
--- a/tools/cabana/dbc/dbcfile.cc
+++ b/tools/cabana/dbc/dbcfile.cc
@@ -55,6 +55,7 @@ void DBCFile::open(const QString &content) {
       sig.is_little_endian = s.is_little_endian;
       sig.updatePrecision();
     }
+    m.updateMask();
   }
   parseExtraInfo(content);
 
@@ -103,6 +104,7 @@ bool DBCFile::writeContents(const QString &fn) {
 cabana::Signal *DBCFile::addSignal(const MessageId &id, const cabana::Signal &sig) {
   if (auto m = const_cast<cabana::Msg *>(msg(id.address))) {
     m->sigs.push_back(sig);
+    m->updateMask();
     return &m->sigs.last();
   }
 
@@ -113,6 +115,7 @@ cabana::Signal *DBCFile::addSignal(const MessageId &id, const cabana::Signal &si
   if (auto m = const_cast<cabana::Msg *>(msg(id))) {
     if (auto s = (cabana::Signal *)m->sig(sig_name)) {
       *s = sig;
+      m->updateMask();
       return s;
     }
   }
@@ -135,6 +138,7 @@ void DBCFile::removeSignal(const MessageId &id, const QString &sig_name) {
     auto it = std::find_if(m->sigs.begin(), m->sigs.end(), [&](auto &s) { return s.name == sig_name; });
     if (it != m->sigs.end()) {
       m->sigs.erase(it);
+      m->updateMask();
     }
   }
 }
@@ -167,6 +171,15 @@ QString DBCFile::newSignalName(const MessageId &id) {
   return name;
 }
 
+const QList<uint8_t>& DBCFile::mask(const MessageId &id) const {
+  const cabana::Msg *m = msg(id);
+  if (m != nullptr) {
+    return m->mask;
+  } else {
+    return empty_mask;
+  }
+}
+
 std::map<uint32_t, cabana::Msg> DBCFile::getMessages() {
   return msgs;
 }
diff --git a/tools/cabana/dbc/dbcfile.h b/tools/cabana/dbc/dbcfile.h
index e048dc5839..8083704160 100644
--- a/tools/cabana/dbc/dbcfile.h
+++ b/tools/cabana/dbc/dbcfile.h
@@ -41,6 +41,8 @@ public:
   QString newMsgName(const MessageId &id);
   QString newSignalName(const MessageId &id);
 
+  const QList<uint8_t>& mask(const MessageId &id) const;
+
   std::map<uint32_t, cabana::Msg> getMessages();
   const cabana::Msg *msg(const MessageId &id) const;
   const cabana::Msg *msg(uint32_t address) const;
@@ -58,4 +60,5 @@ private:
   void parseExtraInfo(const QString &content);
   std::map<uint32_t, cabana::Msg> msgs;
   QString name_;
+  QList<uint8_t> empty_mask;
 };
diff --git a/tools/cabana/dbc/dbcmanager.cc b/tools/cabana/dbc/dbcmanager.cc
index 390ded8512..2451ff9b00 100644
--- a/tools/cabana/dbc/dbcmanager.cc
+++ b/tools/cabana/dbc/dbcmanager.cc
@@ -188,6 +188,15 @@ QString DBCManager::newSignalName(const MessageId &id) {
   return dbc_file->newSignalName(id);
 }
 
+const QList<uint8_t>& DBCManager::mask(const MessageId &id) const {
+  auto sources_dbc_file = findDBCFile(id);
+  if (!sources_dbc_file) {
+    return empty_mask;
+  }
+  auto [_, dbc_file] = *sources_dbc_file;
+  return dbc_file->mask(id);
+}
+
 std::map<MessageId, cabana::Msg> DBCManager::getMessages(uint8_t source) {
   std::map<MessageId, cabana::Msg> ret;
 
diff --git a/tools/cabana/dbc/dbcmanager.h b/tools/cabana/dbc/dbcmanager.h
index 96d9380dbd..3b148bb61d 100644
--- a/tools/cabana/dbc/dbcmanager.h
+++ b/tools/cabana/dbc/dbcmanager.h
@@ -39,6 +39,8 @@ public:
   QString newMsgName(const MessageId &id);
   QString newSignalName(const MessageId &id);
 
+  const QList<uint8_t>& mask(const MessageId &id) const;
+
   std::map<MessageId, cabana::Msg> getMessages(uint8_t source);
   const cabana::Msg *msg(const MessageId &id) const;
   const cabana::Msg* msg(uint8_t source, const QString &name);
@@ -57,6 +59,7 @@ public:
 
 private:
   SourceSet sources;
+  QList<uint8_t> empty_mask;
 
 public slots:
   void updateSources(const SourceSet &s);
diff --git a/tools/cabana/historylog.cc b/tools/cabana/historylog.cc
index 4c193666dc..13e8f70a8f 100644
--- a/tools/cabana/historylog.cc
+++ b/tools/cabana/historylog.cc
@@ -138,6 +138,7 @@ std::deque<HistoryLogModel::Message> HistoryLogModel::fetchData(InputIt first, I
 }
 
 std::deque<HistoryLogModel::Message> HistoryLogModel::fetchData(uint64_t from_time, uint64_t min_time) {
+  const QList<uint8_t> mask;
   const auto &events = can->events(msg_id);
   const auto freq = can->lastMessage(msg_id).freq;
   const bool update_colors = !display_signals_mode || sigs.empty();
@@ -150,7 +151,7 @@ std::deque<HistoryLogModel::Message> HistoryLogModel::fetchData(uint64_t from_ti
     auto msgs = fetchData(first, events.rend(), min_time);
     if (update_colors && (min_time > 0 || messages.empty())) {
       for (auto it = msgs.rbegin(); it != msgs.rend(); ++it) {
-        hex_colors.compute(it->data.data(), it->data.size(), it->mono_time / (double)1e9, speed, freq);
+        hex_colors.compute(it->data.data(), it->data.size(), it->mono_time / (double)1e9, speed, mask, freq);
         it->colors = hex_colors.colors;
       }
     }
@@ -163,7 +164,7 @@ std::deque<HistoryLogModel::Message> HistoryLogModel::fetchData(uint64_t from_ti
     auto msgs = fetchData(first, events.cend(), 0);
     if (update_colors) {
       for (auto it = msgs.begin(); it != msgs.end(); ++it) {
-        hex_colors.compute(it->data.data(), it->data.size(), it->mono_time / (double)1e9, speed, freq);
+        hex_colors.compute(it->data.data(), it->data.size(), it->mono_time / (double)1e9, speed, mask, freq);
         it->colors = hex_colors.colors;
       }
     }
diff --git a/tools/cabana/messageswidget.cc b/tools/cabana/messageswidget.cc
index f7b25bde51..66523333ad 100644
--- a/tools/cabana/messageswidget.cc
+++ b/tools/cabana/messageswidget.cc
@@ -51,6 +51,9 @@ MessagesWidget::MessagesWidget(QWidget *parent) : QWidget(parent) {
   suppress_clear = new QPushButton();
   suppress_layout->addWidget(suppress_add);
   suppress_layout->addWidget(suppress_clear);
+  QCheckBox *suppress_defined_signals = new QCheckBox(tr("Suppress Defined Signals"), this);
+  suppress_defined_signals->setChecked(settings.suppress_defined_signals);
+  suppress_layout->addWidget(suppress_defined_signals);
   main_layout->addLayout(suppress_layout);
 
   // signals/slots
@@ -61,6 +64,9 @@ MessagesWidget::MessagesWidget(QWidget *parent) : QWidget(parent) {
     view->setUniformRowHeights(!settings.multiple_lines_bytes);
     model->sortMessages();
   });
+  QObject::connect(suppress_defined_signals, &QCheckBox::stateChanged, [=](int state) {
+    settings.suppress_defined_signals = (state == Qt::Checked);
+  });
   QObject::connect(can, &AbstractStream::msgsReceived, model, &MessageListModel::msgsReceived);
   QObject::connect(can, &AbstractStream::streamStarted, this, &MessagesWidget::reset);
   QObject::connect(dbc(), &DBCManager::DBCFileChanged, model, &MessageListModel::sortMessages);
diff --git a/tools/cabana/settings.cc b/tools/cabana/settings.cc
index f759324988..d0cada680a 100644
--- a/tools/cabana/settings.cc
+++ b/tools/cabana/settings.cc
@@ -38,6 +38,7 @@ void Settings::save() {
   s.setValue("log_livestream", log_livestream);
   s.setValue("log_path", log_path);
   s.setValue("drag_direction", drag_direction);
+  s.setValue("suppress_defined_signals", suppress_defined_signals);
 }
 
 void Settings::load() {
@@ -61,6 +62,7 @@ void Settings::load() {
   log_livestream = s.value("log_livestream", true).toBool();
   log_path = s.value("log_path").toString();
   drag_direction = (Settings::DragDirection)s.value("drag_direction", 0).toInt();
+  suppress_defined_signals = s.value("suppress_defined_signals", false).toBool();
   if (log_path.isEmpty()) {
     log_path = QStandardPaths::writableLocation(QStandardPaths::HomeLocation) + "/cabana_live_stream/";
   }
diff --git a/tools/cabana/settings.h b/tools/cabana/settings.h
index 11548ef5cc..b8a3797f86 100644
--- a/tools/cabana/settings.h
+++ b/tools/cabana/settings.h
@@ -36,6 +36,7 @@ public:
   int sparkline_range = 15; // 15 seconds
   bool multiple_lines_bytes = true;
   bool log_livestream = true;
+  bool suppress_defined_signals = false;
   QString log_path;
   QString last_dir;
   QString last_route_dir;
diff --git a/tools/cabana/streams/abstractstream.cc b/tools/cabana/streams/abstractstream.cc
index 3c7291ea38..3451c15291 100644
--- a/tools/cabana/streams/abstractstream.cc
+++ b/tools/cabana/streams/abstractstream.cc
@@ -27,7 +27,8 @@ void AbstractStream::updateMessages(QHash<MessageId, CanData> *messages) {
 }
 
 void AbstractStream::updateEvent(const MessageId &id, double sec, const uint8_t *data, uint8_t size) {
-  all_msgs[id].compute((const char *)data, size, sec, getSpeed());
+  QList<uint8_t> mask = settings.suppress_defined_signals ? dbc()->mask(id) : QList<uint8_t>();
+  all_msgs[id].compute((const char *)data, size, sec, getSpeed(), mask);
   if (!new_msgs->contains(id)) {
     new_msgs->insert(id, {});
   }
@@ -67,10 +68,11 @@ void AbstractStream::updateLastMsgsTo(double sec) {
     auto it = std::lower_bound(ev.crbegin(), ev.crend(), last_ts, [](auto e, uint64_t ts) {
       return e->mono_time > ts;
     });
+    QList<uint8_t> mask = settings.suppress_defined_signals ? dbc()->mask(id) : QList<uint8_t>();
     if (it != ev.crend()) {
       double ts = (*it)->mono_time / 1e9 - routeStartTime();
       auto &m = all_msgs[id];
-      m.compute((const char *)(*it)->dat, (*it)->size, ts, getSpeed());
+      m.compute((const char *)(*it)->dat, (*it)->size, ts, getSpeed(), mask);
       m.count = std::distance(it, ev.crend());
       m.freq = m.count / std::max(1.0, ts);
     }
@@ -153,7 +155,7 @@ static inline QColor blend(const QColor &a, const QColor &b) {
   return QColor((a.red() + b.red()) / 2, (a.green() + b.green()) / 2, (a.blue() + b.blue()) / 2, (a.alpha() + b.alpha()) / 2);
 }
 
-void CanData::compute(const char *can_data, const int size, double current_sec, double playback_speed, uint32_t in_freq) {
+void CanData::compute(const char *can_data, const int size, double current_sec, double playback_speed, const QList<uint8_t> &mask, uint32_t in_freq) {
   ts = current_sec;
   ++count;
   freq = in_freq == 0 ? count / std::max(1.0, current_sec) : in_freq;
@@ -171,8 +173,9 @@ void CanData::compute(const char *can_data, const int size, double current_sec,
     const QColor &greyish_blue = !lighter ? GREYISH_BLUE : GREYISH_BLUE_LIGHTER;
 
     for (int i = 0; i < size; ++i) {
-      const uint8_t last = dat[i];
-      const uint8_t cur = can_data[i];
+      const uint8_t mask_byte = (i < mask.size()) ? (~mask[i]) : 0xff;
+      const uint8_t last = dat[i] & mask_byte;
+      const uint8_t cur = can_data[i] & mask_byte;
       const int delta = cur - last;
 
       if (last != cur) {
diff --git a/tools/cabana/streams/abstractstream.h b/tools/cabana/streams/abstractstream.h
index d031b6229c..80c11d2f19 100644
--- a/tools/cabana/streams/abstractstream.h
+++ b/tools/cabana/streams/abstractstream.h
@@ -13,7 +13,7 @@
 #include "tools/replay/replay.h"
 
 struct CanData {
-  void compute(const char *dat, const int size, double current_sec, double playback_speed, uint32_t in_freq = 0);
+  void compute(const char *dat, const int size, double current_sec, double playback_speed, const QList<uint8_t> &mask, uint32_t in_freq = 0);
 
   double ts = 0.;
   uint32_t count = 0;