diff --git a/docs/stylesheets/extra.css b/docs/stylesheets/extra.css
new file mode 100644
index 0000000..4fba6fd
--- /dev/null
+++ b/docs/stylesheets/extra.css
@@ -0,0 +1,6 @@
+/* docs/stylesheets/extra.css */
+/* https://stackoverflow.com/questions/1899772/what-is-the-best-practice-for-showing-an-icon-next-to-text */
+.md-typeset a.plugin_open_external_links_in_new_tab::before {
+        content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAQElEQVR42qXKwQkAIAxDUUdxtO6/RBQkQZvSi8I/pL4BoGw/XPkh4XigPmsUgh0626AjRsgxHTkUThsG2T/sIlzdTsp52kSS1wAAAABJRU5ErkJggg==);
+        margin: 0 3px 0 5px;
+}
\ No newline at end of file