3 files changed, 42 insertions, 12 deletions
diff --git a/gerber/__main__.py b/gerber/__main__.py
index ab0f377..1af4c0f 100644
--- a/gerber/__main__.py
+++ b/gerber/__main__.py
@@ -30,6 +30,7 @@ if __name__ == '__main__':
         print "parsing %s" % filename
         gerberfile = read(filename)
         gerberfile.render(ctx)
+        ctx.set_color(tuple([color * 0.4 for color in ctx.color]))
     print('Saving image to test.svg')
     ctx.dump('test.svg')
 
diff --git a/gerber/excellon.py b/gerber/excellon.py
index 1a498dc..f5d6c29 100755
--- a/gerber/excellon.py
+++ b/gerber/excellon.py
@@ -30,6 +30,15 @@ import math
 
 def read(filename):
     """ Read data from filename and return an ExcellonFile
+    Parameters
+        ----------
+    filename : string
+        Filename of file to parse
+
+    Returns
+    -------
+    file : :class:`gerber.excellon.ExcellonFile`
+        An ExcellonFile created from the specified file.
     """
     detected_settings = detect_excellon_format(filename)
     settings = FileSettings(**detected_settings)
@@ -75,6 +84,14 @@ class ExcellonFile(CamFile):
 
     def render(self, ctx, filename=None):
         """ Generate image of file
+
+        Parameters
+        ----------
+        ctx : :class:`gerber.render.GerberContext`
+            GerberContext subclass used for rendering the image
+
+        filename : string <optional>
+            If provided, the rendered image will be saved to `filename`
         """
         for tool, pos in self.hits:
             ctx.drill(pos[0], pos[1], tool.diameter)
@@ -89,7 +106,7 @@ class ExcellonFile(CamFile):
 
 class ExcellonParser(object):
     """ Excellon File Parser
-    
+
     Parameters
     ----------
     settings : FileSettings or dict-like
@@ -129,15 +146,15 @@ class ExcellonParser(object):
                 ymin = y if y < ymin else ymin
                 ymax = y if y > ymax else ymax
         return ((xmin, xmax), (ymin, ymax))
-    
+
     @property
     def hole_sizes(self):
         return [stmt.diameter for stmt in self.statements if isinstance(stmt, ExcellonTool)]
-    
+
     @property
     def hole_count(self):
         return len(self.hits)
-    
+
     def parse(self, filename):
         with open(filename, 'r') as f:
             for line in f:
@@ -316,7 +333,7 @@ def detect_excellon_format(filename):
     # Bail out here if we got everything....
     if detected_format is not None and detected_zeros is not None:
         return {'format': detected_format, 'zero_suppression': detected_zeros}
-    
+
     # Otherwise score each option and pick the best candidate
     else:
         scores = {}
@@ -338,4 +355,3 @@ def _layer_size_score(size, hole_count, hole_area):
     hole_score = (hole_percentage - 0.25) ** 2
     size_score = (board_area - 8) **2
     return hole_score * size_score
-    
-\ No newline at end of file
diff --git a/gerber/gerber.py b/gerber/gerber.py
index 215b970..335b443 100644
--- a/gerber/gerber.py
+++ b/gerber/gerber.py
@@ -15,12 +15,7 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""
-Gerber File module
-==================
-**Gerber File module**
-
-This module provides an RS-274-X class and parser
+""" This module provides an RS-274-X class and parser.
 """
 
 
@@ -34,6 +29,16 @@ from .cam import CamFile, FileSettings
 
 def read(filename):
     """ Read data from filename and return a GerberFile
+
+    Parameters
+    ----------
+    filename : string
+        Filename of file to parse
+
+    Returns
+    -------
+    file : :class:`gerber.gerber.GerberFile`
+        A GerberFile created from the specified file.
     """
     return GerberParser().parse(filename)
 
@@ -113,6 +118,14 @@ class GerberFile(CamFile):
 
     def render(self, ctx, filename=None):
         """ Generate image of layer.
+
+        Parameters
+        ----------
+        ctx : :class:`GerberContext`
+            GerberContext subclass used for rendering the image
+
+        filename : string <optional>
+            If provided, the rendered image will be saved to `filename`
         """
         ctx.set_bounds(self.bounds)
         for statement in self.statements: