diff --git a/docs/_build/html b/docs/_build/html
index 66c981da..7041b9c3 160000
--- a/docs/_build/html
+++ b/docs/_build/html
@@ -1 +1 @@
-Subproject commit 66c981dae2d4c874e2897b60cf1f8cb4c3f04f4b
+Subproject commit 7041b9c394d596e4a6f0c7608e4f364532129960
diff --git a/impy/viewer/keybinds.py b/impy/viewer/keybinds.py
index cf5a0fe3..09baf82e 100644
--- a/impy/viewer/keybinds.py
+++ b/impy/viewer/keybinds.py
@@ -1,12 +1,13 @@
-from impy.viewer.widgets.dialog import ProjectionDialog
-from ..arrays import LabeledArray
-from ..core import array as ip_array
-from .utils import *
-from .widgets import DuplicateDialog
 import numpy as np
 from napari.layers.utils._link_layers import link_layers, unlink_layers
 import napari
 
+from .utils import *
+from .widgets import DuplicateDialog, ProjectionDialog
+
+from ..arrays import LabeledArray
+from ..core import array as ip_array
+
 # Shift, Control, Alt, Meta, Up, Down, Left, Right, PageUp, PageDown, Insert, 
 # Delete, Home, End, Escape, Backspace, F1, F2, F3, F4, F5, F6, F7, F8, F9, F10,
 # F11, F12, Space, Enter, Tab
@@ -336,7 +337,7 @@ def proj(viewer:"napari.Viewer"):
 @bind_key
 def duplicate_layer(viewer:"napari.Viewer"):
     """
-    Duplicate selected layer(s).
+    Duplicate the selected layer.
     """
     layer = get_a_selected_layer(viewer)
     
diff --git a/impy/viewer/widgets/dialog.py b/impy/viewer/widgets/dialog.py
index 634a90ef..c59ef197 100644
--- a/impy/viewer/widgets/dialog.py
+++ b/impy/viewer/widgets/dialog.py
@@ -1,6 +1,4 @@
 from __future__ import annotations
-from impy.utils.axesop import find_first_appeared
-from PyQt5.QtWidgets import QVBoxLayout
 from qtpy.QtWidgets import QDialog, QPushButton, QLabel, QGridLayout, QCheckBox, QLineEdit, QComboBox, QHBoxLayout
 import napari
 import numpy as np
@@ -9,6 +7,7 @@
 from ..utils import add_labeledarray, copy_layer, front_image, add_labels
 from ..._const import SetConst
 from ...utils.slicer import axis_targeted_slicing
+from ...utils.axesop import find_first_appeared
 
 def close_anyway(func):
     @wraps(func)
@@ -85,6 +84,9 @@ def _add_widgets(self):
     
 
 class DuplicateDialog(QDialog):
+    """
+    This dialog is opened when an image layer is duplicated.
+    """
     def __init__(self, viewer:"napari.Viewer", layer):
         self.viewer = viewer
         self.layer = layer
@@ -169,6 +171,9 @@ def _add_widgets(self):
         return None
 
 class ProjectionDialog(QDialog):
+    """
+    This dialog is opened when an image layer is projected.
+    """
     def __init__(self, viewer:"napari.Viewer", layer):
         self.viewer = viewer
         self.layer = layer
diff --git a/impy/viewer/widgets/explorer.py b/impy/viewer/widgets/explorer.py
index eb2a7d1d..b56a92b5 100644
--- a/impy/viewer/widgets/explorer.py
+++ b/impy/viewer/widgets/explorer.py
@@ -15,6 +15,10 @@
 from ...core import imread
 
 class Explorer(QWidget):
+    """
+    A Read-only explorer widget. Capable of filter, set working directory, copy path and open file in the viewer.
+    By default QTreeView supports real time update on file change.
+    """
     def __init__(self, viewer:"napari.Viewer", path:str=""):
         super().__init__(viewer.window._qt_window)
         self.viewer = viewer
@@ -92,7 +96,7 @@ def __init__(self, parent, path:str):
         
         self.show()
     
-    def _set_file_model(self, path):
+    def _set_file_model(self, path:str):
         self.file_system.setRootPath(path)
         self.setModel(self.file_system)
         self.setRootIndex(self.file_system.index(path))
@@ -173,7 +177,7 @@ def keyPressEvent(self, event):
             return super().keyPressEvent(event)
     
     @property
-    def selected(self):
+    def selected(self) -> QModelIndex:
         inds = self.selectionModel().selectedIndexes()
         if len(inds) > 0:
             index = inds[0]
diff --git a/impy/viewer/widgets/textedit.py b/impy/viewer/widgets/textedit.py
index 568b756e..09f49d31 100644
--- a/impy/viewer/widgets/textedit.py
+++ b/impy/viewer/widgets/textedit.py
@@ -16,6 +16,9 @@ def read_txt(viewer:"napari.Viewer", path:str):
     return viewer.window.add_dock_widget(text, area="right", name=title)
 
 class TxtFileWidget(QWidget):
+    """
+    A read-only text viewer widget with JSON-like highlight. Capable of search lines.
+    """
     def __init__(self, viewer:"napari.Viewer", title:str=None):
         super().__init__(viewer.window._qt_window)
         self.viewer = viewer
@@ -103,6 +106,8 @@ def _():
         self.layout().addWidget(wid)
     
     def change_wrap_mode(self):
+        # line wrap mode = 0 -> No wrap 
+        # line wrap mode = 1 -> wrapped
         mode = self.txtviewer.lineWrapMode()
         self.txtviewer.setLineWrapMode(1-mode)
         return None