The symbols used for [inbound] and [outbound] are part of the [Supplementary Multilingual Plane](smp) (or Plane 1). This set of symbols are not as well supported by font sets, as discovered by many reports of the characters missing. There are two other arrow characters: [south east] and [north east] that serve the same style and are part of the [Basic Multilingual Plane](bmp) (or Plane 0). This set of characters is more widely supported. [inbound]: https://www.compart.com/en/unicode/U+1F866 [outbound]: https://www.compart.com/en/unicode/U+1F865 [smp]: https://en.wikipedia.org/wiki/Plane_(Unicode)#Supplementary_Multilingual_Plane [bmp]: https://en.wikipedia.org/wiki/Plane_(Unicode)#Basic_Multilingual_Plane [north east]: https://www.compart.com/en/unicode/U+2197 [south east]: https://www.compart.com/en/unicode/U+2198 |
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