René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Bug / Inconsistency: Title Format Lost After Interactive Editing","articleBody":"### Bug summary\n\nWhen a figure is plotted with a bold/dark title or legend, e.g.:\n\n\u003cimg width=\"900\" height=\"700\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/029a302f-c100-4c1c-9853-ee80b55fe623\" /\u003e\n\nPlot The title appears correctly (bold, dark).\n\nBut when the user edits any label/title from the interactive Matplotlib plotting window, such as:\n- Editing xlabel\n- Editing ylabel\n- Editing legend text\n- Changing marker properties\n\nexample:\n\n\u003cimg width=\"927\" height=\"781\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/383f98e4-73b2-430b-afdb-fc633e1f98e7\" /\u003e\n\n\n→ the title formatting immediately resets, e.g.:\n\n- Bold becomes normal\n- Color lightens or resets\n- Weight lost\n\nexample: like \n\n\u003cimg width=\"1107\" height=\"782\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/a0e0d7a4-3113-41e5-8c04-b4df84de4df2\" /\u003e\n\nThis is unexpected and interrupts the workflow.\n\n\n\n### Code for reproduction\n\n```Python\nimport numpy as np\nimport matplotlib.pyplot as plt\nfrom matplotlib.ticker import MultipleLocator\n\n# Define the x range\nx = np.linspace(-2, 2, 1000)\n\n# Define the wave packet: high-frequency sine modulated by a Gaussian envelope\ny = np.sin(50 * x) * np.exp(-x**2)\n\n\n\n#Plotting information \n# Create 3 subplots (3 rows, 1 column)\nfig, ax = plt.subplots(figsize=(9, 7))  # Adjust figure size if needed\n\n# Customize tick parameters for bold text\nax.tick_params(axis='both', direction='in', which='both')\nax.tick_params(which='both', width=2)\nax.tick_params(which='major', length=7, color='r')\nax.tick_params(which='minor', length=4)\nax.minorticks_on()  # Turn on minor ticks\n\n# Set bold tick labels in Times New Roman\nax.tick_params(axis='x', labelsize=12)\nax.tick_params(axis='y', labelsize=12)\nfor label in ax.get_xticklabels() + ax.get_yticklabels():\n    label.set_fontweight('bold')\n    label.set_fontname(\"Times New Roman\")\n    label.set_fontsize(20)\n\n# Set X-axis tick spacing (step size = 2)\nax.xaxis.set_major_locator(MultipleLocator(2))\n\n    \n# Define font settings\nfont_settings = {\n    \"fontname\": \"Times New Roman\",\n    \"fontsize\": 20,  # Change this for font size\n    \"fontweight\": \"bold\"\n}\n\n# Labeling axes and title\nax.plot(x, y, label= 'Group Wave', color='blue')\nax.set_xlabel('Wave packet length', **font_settings)\nax.set_title('High-Frequency Group Wave Packet', **font_settings) \nax.set_ylabel('Amplitude', **font_settings)\nax.legend(prop={'family': 'Times New Roman', 'weight': 'bold', 'size': 12})\nax.grid(True, linestyle=\"--\", linewidth=0.5)\n#plt.savefig('wave packet ')\nplt.grid(True)\nplt.show()\n```\n\n### Actual outcome\n\nTitle loses bold/dark formatting.\nText properties revert to default settings.\n\n\u003cimg width=\"1107\" height=\"782\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/52d3478f-203c-4725-86f8-af575607b13b\" /\u003e\n\n### Expected outcome\n\nTitle and other text properties should remain intact.\nEditing a label should NOT modify unrelated elements.\n\n\u003cimg width=\"900\" height=\"700\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/06fe523d-f3d4-47e3-8c03-5cbc21b4b613\" /\u003e\n\n\n### Additional information\n\nThis problem interrupt the workflow....\n\n### Operating system\n\nWindows\n\n### Matplotlib Version\n\nMatplotlib: 3.7.0\n\n### Matplotlib Backend\n\nMatplotlib backend: Qt5Agg\n\n### Python version\n\nPython: 3.10.9 | packaged by Anaconda, Inc. | (main, Mar  1 2023, 18:18:15) [MSC v.1916 64 bit (AMD64)]\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\nconda","author":{"url":"https://github.com/mdmalik95","@type":"Person","name":"mdmalik95"},"datePublished":"2025-11-20T09:38:12.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/30770/matplotlib/issues/30770"}