Gerben Wierda via ntg-context schrieb am 23.10.2021 um 15:24:
On 23 Oct 2021, at 15:15, Pablo Rodriguez via ntg-context <ntg-context@ntg.nl> wrote:

On 10/23/21 3:00 PM, Gerben Wierda via ntg-context wrote:
By the way, neither does \blackboard{Q} work. But \rationals works in
the case of the letter Q.

Hi Gerben,

it only seems to work inside math:

 \starttext
 \dorecurse{26}{$\blackboard\characters{\recurselevel}
 \Characters{\recurselevel}$}
 \stoptext

I hope it helps,

Yes, the new \blackboard command works, so $\blackboard{Q}$ works. Thanks.

The \blackboard command is a switch like \it, to keep it local to a single character put the left brace before the command.

    $Q {\blackboard Q} Q$

Wolfgang