PROBLEM: Emojis don't render in PDF (showing as empty boxes)
SOLUTION:
- Use down-pointing triangle (▼) using HTML entity ▼
- This Unicode character renders properly in mPDF/PDF generators
- Darker gray background (#cccccc) for better B&W visibility
- Bold 3px border on selected box
- Larger font and padding for selected number
Visual indicators that work in B&W printing:
- Triangle (▼) above selected level
- Dark gray shading on selected box
- Bold border on selected box
- Bold text for selected label
DevSoftTech Server
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