diff --git a/galleries/examples/color/named_colors.py b/galleries/examples/color/named_colors.py
index c6cba68ab434..96612c353c90 100644
--- a/galleries/examples/color/named_colors.py
+++ b/galleries/examples/color/named_colors.py
@@ -31,6 +31,7 @@ def plot_colortable(colors, *, ncols=4, sort_colors=True):
     cell_height = 22
     swatch_width = 48
     margin = 12
+    ncols = 4
 
     # Sort colors by hue, saturation, value and name.
     if sort_colors is True:
@@ -42,14 +43,14 @@ def plot_colortable(colors, *, ncols=4, sort_colors=True):
     n = len(names)
     nrows = math.ceil(n / ncols)
 
-    width = cell_width * 4 + 2 * margin
+    width = cell_width * ncols + 2 * margin
     height = cell_height * nrows + 2 * margin
     dpi = 72
 
     fig, ax = plt.subplots(figsize=(width / dpi, height / dpi), dpi=dpi)
     fig.subplots_adjust(margin/width, margin/height,
                         (width-margin)/width, (height-margin)/height)
-    ax.set_xlim(0, cell_width * 4)
+    ax.set_xlim(0, cell_width * ncols)
     ax.set_ylim(cell_height * (nrows-0.5), -cell_height/2.)
     ax.yaxis.set_visible(False)
     ax.xaxis.set_visible(False)
diff --git a/galleries/plot_types/3D/scatter3d_simple.py b/galleries/plot_types/3D/scatter3d_simple.py
index 023a46448ccf..ef2f8443ca80 100644
--- a/galleries/plot_types/3D/scatter3d_simple.py
+++ b/galleries/plot_types/3D/scatter3d_simple.py
@@ -1,7 +1,7 @@
 """
-==============
-3D scatterplot
-==============
+================
+scatter(x, y, z)
+================
 
 See `~mpl_toolkits.mplot3d.axes3d.Axes3D.scatter`.
 """
diff --git a/galleries/plot_types/3D/surface3d_simple.py b/galleries/plot_types/3D/surface3d_simple.py
index b421469b821d..04f74d5edd14 100644
--- a/galleries/plot_types/3D/surface3d_simple.py
+++ b/galleries/plot_types/3D/surface3d_simple.py
@@ -1,6 +1,6 @@
 """
 =====================
-3D surface
+plot_surface(X, Y, Z)
 =====================
 
 See `~mpl_toolkits.mplot3d.axes3d.Axes3D.plot_surface`.
diff --git a/galleries/plot_types/3D/trisurf3d_simple.py b/galleries/plot_types/3D/trisurf3d_simple.py
index 6bf3dc0835d5..b32bd3ebc69a 100644
--- a/galleries/plot_types/3D/trisurf3d_simple.py
+++ b/galleries/plot_types/3D/trisurf3d_simple.py
@@ -1,7 +1,7 @@
 """
-======================
-Triangular 3D surfaces
-======================
+=====================
+plot_trisurf(x, y, z)
+=====================
 
 See `~mpl_toolkits.mplot3d.axes3d.Axes3D.plot_trisurf`.
 """
diff --git a/galleries/plot_types/3D/voxels_simple.py b/galleries/plot_types/3D/voxels_simple.py
index c3473e108969..5e6dcffb87f1 100644
--- a/galleries/plot_types/3D/voxels_simple.py
+++ b/galleries/plot_types/3D/voxels_simple.py
@@ -1,7 +1,7 @@
 """
-==========================
-3D voxel / volumetric plot
-==========================
+=================
+voxels([x, y, z])
+=================
 
 See `~mpl_toolkits.mplot3d.axes3d.Axes3D.voxels`.
 """
diff --git a/galleries/plot_types/3D/wire3d_simple.py b/galleries/plot_types/3D/wire3d_simple.py
index 8ce1a460617e..1ab847f3ecf4 100644
--- a/galleries/plot_types/3D/wire3d_simple.py
+++ b/galleries/plot_types/3D/wire3d_simple.py
@@ -1,7 +1,7 @@
 """
-=================
-3D wireframe plot
-=================
+=======================
+plot_wireframe(X, Y, Z)
+=======================
 
 See `~mpl_toolkits.mplot3d.axes3d.Axes3D.plot_wireframe`.
 """