update: add image and explain edge inclusion

Author: VsevolodX

other/materials_designer/create_grain_boundary_film.ipynb

@@ -35,7 +35,10 @@
     "## 1. Prepare the Environment\n",
     "### 1.1. Set up the notebook\n",
     "Set the following flags to control the notebook behavior\n",
-    "For more information on the parameters and algorithm, refer to [Grain Boundary Builder Source](https://github.com/Exabyte-io/made/blob/35b9f318f5d667e0f5af023f3178bc4404317ab0/src/py/mat3ra/made/tools/build/grain_boundary/builders.py#L103)\n"
+    "For more information on the parameters and algorithm, refer to [Grain Boundary Builder Source](https://github.com/Exabyte-io/made/blob/35b9f318f5d667e0f5af023f3178bc4404317ab0/src/py/mat3ra/made/tools/build/grain_boundary/builders.py#L103)\n",
+    "`EDGE_INCLUSION_TOLERANCE` is a fine-tuning parameter that controls the inclusion of the edge atoms for both orientations in the gap.\n",
+    "For example of Graphene at 17.9 degrees: orange and green atoms are present with the value of 0.5 Angstroms, with value of 0, they will not be included.\n",
+    "<img src=\"https://i.imgur.com/QRgotXS.png\" alt=\"Edge Inclusion Tolerance\" width=\"400\"/>\n"
    ],
    "metadata": {
     "collapsed": false