\DeclareTextSymbolDefault (LaTeX2e unofficial reference manual (November 2018))

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#### 4.1.9 `\DeclareTextSymbolDefault`

Synopsis:

    \DeclareTextSymbolDefault{cmd}{encoding}

If there is an encoding-specific symbol command cmd but there is no associated `\DeclareTextSymbol` for that encoding, then this command will pick up the slack, by saying to get the symbol as described for encoding.

For example, to declare that if the current encoding has no meaning for `\textdollar` then use the one from `OT1`, declare this.

    \DeclareTextSymbolDefault{\textdollar}{OT1}

That is, this command is equivalent to this call (see \UseTextAccent & \UseTextSymbol).

    \DeclareTextCommandDefault{cmd}
       {\UseTextSymbol{encoding}{cmd}}

Note that `\DeclareTextSymbolDefault` can be used to define a default for any zero-argument `fontenc` command.

Unofficial LaTeX2e reference manual