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\starttext
\definemetafont
[
demo
-
symbols
][
demo
-
symbols
.
mp
]
\startbuffer
watch
this
:
{
\demo
\char
"
2
6
1
A
}
\quad
\ruledhbox
{
\demo
\char
"
2
6
1
A
}
\stopbuffer
\definefont
[
demo
][
demo
@
demo
-
symbols
]
\getbuffer
\blank
\definefont
[
demo
][
demo
@
demo
-
symbols
at
\the\dimexpr
3
\exheight
]
\getbuffer
\blank
\definefont
[
demo
][
demo
@
demo
-
symbols
at
\the\dimexpr
4
\exheight
]
\getbuffer
\blank
\stoptext