What ␎ means
␎ is the readable picture of the Shift Out control.
SO is an invisible control code. Teleprinters—machines that printed text sent over a line—used it to switch ribbon colors. ASCII, a standard text code, gave SO a character-set shift role in 1963. Later extension rules used SO to select an alternate graphic set until SI restored the standard set.
Does ␎ itself switch a terminal?
No; ␎ depicts the control but does not execute it.
A terminal changes its character set only when it receives the SO control code. On VT100-style terminals, SO selects G1, an alternate set often containing line-drawing characters; SI restores G0, the standard set. The paired picture ␏ represents SI.
Don't confuse it with
1Questions people ask
1Why does ␎ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ␎
␎\240ECodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
