DOC: Add gallery example for PyGMT logo (#4715)

Author: yvonnefroehlich

examples/gallery/embellishments/gmt_logo.py

@@ -3,6 +3,7 @@
 ========
 
 The :meth:`pygmt.Figure.logo` method allows to place the GMT logo on a figure.
+For plotting the PyGMT logo, see :doc:`PyGMT logo </gallery/embellishments/pygmtlogo>`.
 """
 
 # %%

examples/gallery/embellishments/pygmtlogo.py

@@ -0,0 +1,62 @@
+"""
+PyGMT logo
+==========
+Beside the :doc:`GMT logo </gallery/embellishments/gmt_logo>`, there is a specific logo
+for PyGMT which can be plotted and added to a figure using
+:meth:`pygmt.Figure.pygmtlogo`. The design of the logo itself is kindly provided by
+`@sfrooti <https://github.com/sfrooti>`_ and consists of an icon and the wordmark
+"PyGMT".
+
+The visual logo is available in circle and hexagon shapes. It supports both colored and
+monochrome black-and-white palettes, alongside light and dark theme modes, combining to
+yield eight distinct standalone logo variants. Additionally, the visual logo can
+optionally include the wordmark "PyGMT"; if enabled, the wordmark can be positioned
+either to the right of the icon or beneath it.
+"""
+
+# %%
+import pygmt
+from pygmt.params import Frame
+
+# %%
+# Plot the PyGMT logo without any arguments.
+
+fig = pygmt.Figure()
+fig.pygmtlogo()
+fig.show()
+
+
+# %%
+# Via the ``color``, ``theme``, ``shape`` parameters the appereance of the logo can be
+# changed.
+
+fig = pygmt.Figure()
+fig.basemap(region=[-1, 1] * 2, projection="X5c/5c", frame=Frame(fill="180/199/231"))
+
+fig.pygmtlogo(color=False, position="TL")
+
+fig.pygmtlogo(theme="dark", position="TR")
+
+fig.pygmtlogo(color=False, theme="dark", position="BL")
+
+fig.pygmtlogo(shape="hexagon", position="BR")
+
+fig.show()
+
+
+# %%
+# Via the ``wordamrk`` parameter the text "PyGMT" can be added on the right side or at
+# the bottom of the visual. Use the ``width`` and ``height`` parameters to adjust the
+# size of the logo.
+
+fig = pygmt.Figure()
+fig.basemap(region=[-1, 1] * 2, projection="X7c/5c", frame=Frame(fill="180/199/231"))
+
+fig.pygmtlogo(wordmark="horizontal", position="TC", width="6c")
+
+fig.pygmtlogo(theme="dark", wordmark="vertical", position="BC", height="3c")
+
+fig.show()
+
+
+# sphinx_gallery_thumbnail_number = 1