diff --git a/src/Solver/ASolver.py b/src/Solver/ASolver.py
index a87dad97..568890f5 100644
--- a/src/Solver/ASolver.py
+++ b/src/Solver/ASolver.py
@@ -22,6 +22,7 @@ import logging
 from tools import timer
 
 try:
+    # Installation allow Unix-like signal
     from signal import SIGTERM, SIGSTOP, SIGCONT
     _signal = True
 except:
@@ -358,6 +359,7 @@ class AbstractSolver(object):
 
     def start(self, study, process = None):
         if _signal:
+            # Solver is PAUSED, so continue execution
             if self._status == STATUS.PAUSED:
                 os.kill(self._process.pid(), SIGCONT)
                 self._status = STATUS.RUNNING
@@ -371,6 +373,7 @@ class AbstractSolver(object):
             if self._process is None:
                 return False
 
+            # Send SIGSTOP to PAUSED solver
             os.kill(self._process.pid(), SIGSTOP)
             self._status = STATUS.PAUSED
             return True
diff --git a/src/View/CheckList/Worker.py b/src/View/CheckList/Worker.py
index efd95ded..66e34d2c 100644
--- a/src/View/CheckList/Worker.py
+++ b/src/View/CheckList/Worker.py
@@ -37,10 +37,11 @@ class Worker(QObject):
         self.signalStatus.emit('end')
 
     def _compute(self):
+        # The computation loop
         for checker in self._checker_list:
             self.signalStatus.emit(checker.name)
 
-            # time.sleep(1)
+            # Run checker
             checker.run(self._study)
 
             self.signalStatus.emit("progress")
diff --git a/src/View/Debug/Window.py b/src/View/Debug/Window.py
index 346c2ce0..9b14aa20 100644
--- a/src/View/Debug/Window.py
+++ b/src/View/Debug/Window.py
@@ -92,7 +92,9 @@ class ReplWindow(ASubMainWindow, ListedSubWindow):
         self.set_plaintext_edit_text("plainTextEdit", "")
         self._history_ind = 0
 
+        # Code to rich_code
         rich_code = code.strip().split("\n")
+        # Add return variable for results display at last row
         rich_code[-1] = "self.__debug_exec_result__ = " + rich_code[-1]
         rich_code = "\n".join(rich_code)
         logger.debug(f"User debug command : {rich_code}")
@@ -102,6 +104,8 @@ class ReplWindow(ASubMainWindow, ListedSubWindow):
         except Exception as e:
             value = f"<font color=\"red\">" + str(e) + "</font>"
 
+        # Display code
         msg = f"<font color=\"grey\"> # " + code + " #</font>"
         self.find(QTextEdit, "textEdit").append(msg)
+        # Display results
         self.find(QTextEdit, "textEdit").append(str(value))