Added magic commands note

Author: bjmorgan

CH40208/working_with_data/matplotlib/basics.ipynb

@@ -64,6 +64,9 @@
     "```{note}\n",
     "If you're working on a high-resolution screen, you can add this line after importing to get better quality figures in notebooks:\n",
     "`%config InlineBackend.figure_format='retina'`\n",
+    "```\n",
+    "```{margin}\n",
+    "Commands starting with `%` are Jupyter \"magic commands\" - special instructions that control the notebook environment rather than Python code. They provide shortcuts for common tasks and configuration. Magic commands only work in Jupyter notebooks, not in regular Python scripts.\n",
     "```"
    ]
   },
@@ -536,7 +539,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.12.9"
+   "version": "3.12.3"
   }
  },
  "nbformat": 4,