diff --git a/src/aiidalab_qe/common/bands_pdos/bandpdoswidget.py b/src/aiidalab_qe/common/bands_pdos/bandpdoswidget.py
index c1687adbd..575c8c761 100644
--- a/src/aiidalab_qe/common/bands_pdos/bandpdoswidget.py
+++ b/src/aiidalab_qe/common/bands_pdos/bandpdoswidget.py
@@ -57,8 +57,9 @@ def render(self):
             return
 
         self.dos_atoms_group = ipw.Dropdown(
-            description="Group by:",
+            description="Atom grouping:",
             style={"description_width": "initial"},
+            layout=ipw.Layout(width="350px"),
         )
         ipw.dlink(
             (self._model, "dos_atoms_group_options"),
@@ -74,8 +75,9 @@ def render(self):
         )
 
         self.dos_plot_group = ipw.Dropdown(
-            description="Plot contributions:",
+            description="Orbital grouping:",
             style={"description_width": "initial"},
+            layout=ipw.Layout(width="350px"),
         )
         ipw.dlink(
             (self._model, "dos_plot_group_options"),
@@ -94,6 +96,7 @@ def render(self):
             placeholder="e.g. 1..5 8 10",
             description="Select atoms:",
             style={"description_width": "initial"},
+            layout=ipw.Layout(width="350px"),
         )
         ipw.link(
             (self._model, "selected_atoms"),
diff --git a/src/aiidalab_qe/common/bands_pdos/model.py b/src/aiidalab_qe/common/bands_pdos/model.py
index 6e076e449..690ef10ca 100644
--- a/src/aiidalab_qe/common/bands_pdos/model.py
+++ b/src/aiidalab_qe/common/bands_pdos/model.py
@@ -29,17 +29,17 @@ class BandsPdosModel(Model):
     dos_atoms_group_options = tl.List(
         trait=tl.List(tl.Unicode()),
         default_value=[
-            ("Kinds", "kinds"),
-            ("Atomic position", "atoms"),
+            ("Group by element (atomic species)", "kinds"),
+            ("No grouping (each site separately)", "atoms"),
         ],
     )
     dos_atoms_group = tl.Unicode("kinds")
     dos_plot_group_options = tl.List(
         trait=tl.List(tl.Unicode()),
         default_value=[
-            ("Total", "total"),
-            ("Orbital", "orbital"),
-            ("Angular momentum", "angular_momentum"),
+            ("Group all orbitals per atom", "total"),
+            ("Group by angular momentum ", "angular_momentum"),
+            ("No grouping (each orbital separately)", "orbital"),
         ],
     )
     dos_plot_group = tl.Unicode("total")