diff --git a/doc/user_guide/Customization.ipynb b/doc/user_guide/Customization.ipynb
index 535e3449e..5c5ce5cbf 100644
--- a/doc/user_guide/Customization.ipynb
+++ b/doc/user_guide/Customization.ipynb
@@ -67,11 +67,15 @@
     "        Additional columns to add to the hover tool or 'all' which will\n",
     "        includes all columns (including indexes if use_index is True).\n",
     "    hover_tooltips list[str] or list[tuple]:\n",
-    "        A list of dimensions to be displayed in the hover tooltip.\n",
+    "        A list of dimensions to be displayed in the hover tooltip. See\n",
+    "        [HoloViews docs](https://holoviews.org/user_guide/Plotting_with_Bokeh.html#hover-tools)\n",
+    "        or [Bokeh docs](https://docs.bokeh.org/en/latest/docs/user_guide/interaction/tools.html#hovertool)\n",
+    "        for more info on structuring.\n",
     "    hover_formatters:\n",
     "        A dict of formatting options for the hover tooltip.\n",
     "    hover_mode (default='mouse'):\n",
-    "        The hover mode determines how the hover tool is activated.\n",
+    "        The hover mode determines how the hover tool is activated;\n",
+    "        select from 'mouse', 'vline', or 'hline'.\n",
     "    invert (default=False): boolean\n",
     "        Swaps x- and y-axis\n",
     "    frame_width/frame_height: int\n",