On Wed, Nov 16, 2022 at 10:06:22PM +0700, Yuri Khan wrote:
> On Wed, 16 Nov 2022 at 21:55, Yuri Khan <yuri.v.khan@gmail.com> wrote:
> 
> > * OP uses ‘length’ to measure the text, and ‘make-string’ to build a box.

...or, perhaps, just use the :box face attribute. Whose location
in the docs is left as an exercise to the OP.

Cheers
-- 
t