| General Configs |
| Type | |
| Output | |
| DPI | DPI is available only for PNG and JPEG. If you set null, the image generation will be faster and will be the same as 72dpi. |
| Thickness | |
| Resolution | |
| Rotation | |
| Font | |
| Text | |
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| Specifics Configs |
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| Keys | |
| Explanation | - Known also as USS Code 39, 3 of 9.
- Code 39 can encode alphanumeric characters.
- The symbology is used in non-retail environment.
- Code 39 is designed to encode 26 upper case letters, 10 digits and 7 special characters.
- Code 39 has a checksum but it's rarely used.
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