Figure.meca: Add aliases for "L", "T", and "Fr"

pygmt/src/meca.py

@@ -79,10 +79,13 @@ def data_format_code(convention, component="full"):
     B="frame",
     C="cmap",
     E="extensionfill",
+    Fr="box",
     G="compressionfill",
     J="projection",
+    L="outline",
     N="no_clip",
     R="region",
+    T="nodalplanes",
     V="verbose",
     W="pen",
     c="panel",
@@ -206,6 +209,10 @@ def meca(
         List must be the same length as the number of events. Will override
         the ``event_name`` values in ``spec`` if ``spec`` is a dictionary
         or pd.DataFrame.
+    box : bool or str
+        [*fill*]
+        Draw a box behind the label if given via parameter or column
+        ``event_name``. Give a color for *fill* [Default is ``"white"``].
     offset : bool or str
         [**+p**\ *pen*][**+s**\ *size*].
         Offset beachball(s) to longitude(s) and latitude(s) specified in the
@@ -214,16 +221,38 @@ def meca(
         is plotted at the initial location and a line connects the beachball
         to the circle. Use **+s**\ *size* to set the diameter of the circle
         [Default is no circle]. Use **+p**\ *pen* to set the line pen
-        attributes [Default is ``"0.25p"``].
+        attributes [Default is ``"0.25p,black,solid"``].
     compressionfill : str
         Set color or pattern for filling compressive quadrants
         [Default is ``"black"``].
     extensionfill : str
         Set color or pattern for filling extensive quadrants
         [Default is ``"white"``].
-    pen : str
-        Set pen attributes for outline of beachball
-        [Default is ``"0.25p,black,solid"``].
+    pen : bool or str
+        Set pen attributes for all lines related to beachball
+        [Default is ``"0.25p,black,solid"``]. This setting applies to
+        ``outline``, ``nodalplanes``, and ``offset``, unless overruled
+        by arguments passed to those parameters. Draws circumference of
+        beachball.
+    outline : bool or str
+        [*pen*]
+        Draw nodal planes and circumference of beachaball. Use *pen*
+        to use different pen attributes as the ones set via ``pen``.
+    nodalplanes : bool, int or str
+        [*nplane*][/*pen*]
+        Plot the nodal planes and outline the bubble which is transparent.
+        If *nplane* is
+
+        - ``0`` or ``True``: both nodal planes are plotted [Default].
+        - ``1``: only the first nodal plane is plotted.
+        - ``2``: only the second nodal plane is plotted.
+
+        Append /*pen* to set the pen attributes for this feature [Default
+        is set via ``pen``].
+        For double couple mechanisms, ``nodalplanes`` renders the beachball
+        transparent by drawing only the nodal planes and the circumference.
+        For non-double couple mechanisms, ``nodalplanes=0`` overlays best
+        double couple transparently.
     cmap : str
         File name of a CPT file or a series of comma-separated colors (e.g.,
         *color1,color2,color3*) to build a linear continuous CPT from those