Add a tutorial to add frames (#12)

Author: Esteban82

docs/index.rst

@@ -99,3 +99,10 @@ Basics
       :align: center
 
    :doc:`tutorials/basics/coastlines`
+
+-  .. image:: _images/18736ae188d169a16383b28a3a7afcb8.png
+      :target: tutorials/basics/frames.html
+      :width: 80%
+      :align: center
+
+   :doc:`tutorials/basics/frames`

docs/tutorials/basics/frames.rst

@@ -0,0 +1,70 @@
+Frames, ticks, titles, and labels
+-----------------------
+
+Setting frame, ticks, title, etc., of the plot is handled by the :gmt-module:`-B <basemap#b>` parameter that most plotting modules contain like :gmt-module:`basemap`.
+
+Plot Frame
+~~~~~~~~~~
+
+By default, GMT does not add a frame to your plot. For example, we can plot
+the coastlines of the world with a Mercator projection:
+
+
+.. gmtplot::
+
+   gmt begin frames png
+      gmt coast -R-180/180/-60/60 -JM25c -W
+   gmt end show
+
+
+To add the default GMT frame style to the plot, add **f** to the :gmt-module:`-B <basemap#b>`.
+
+
+   .. gmtplot::
+
+      gmt begin frames png
+         gmt coast -R-180/180/-60/60 -JM25c -W
+         gmt basemap -Bf
+      gmt end show
+
+
+Tick labels
+~~~~~~~~~~
+
+In GMT the tick labels are called annotations. Add them by passing **a** through the :gmt-module:`-B <basemap#b>` parameter:
+
+   .. gmtplot::
+
+      gmt begin frames png
+         gmt coast -R-180/180/-60/60 -JM25c -W
+         gmt basemap -Baf
+      gmt end show
+
+
+
+Gridlines
+~~~~~~~~~~
+
+Add automatic grid lines to the plot by adding **g**:
+
+
+   .. gmtplot::
+
+      gmt begin frames png
+         gmt coast -R-180/180/-60/60 -JM25c -W
+         gmt basemap -Bafg
+      gmt end show
+
+
+Title
+~~~~~~~~~~
+
+The figure title can be set by passing **+ttitle**:
+
+   .. gmtplot::
+
+      gmt begin frames png
+         gmt coast -R-180/180/-60/60 -JM25c -W
+         gmt basemap -Bafg
+         gmt basemap -B+t"Mercator Map"
+      gmt end show