[Therion] How to add 1.5 x linefeed to a text string

[Bruce Mutton]

>> I'm wondering if there is a way to add a 1.5x <br> linefeed to text 
>> strings in Therion?

>Not sure if there is a proper way, but you can just put tex into the text
input in xtherion, right? If so, you could try foo \thtinysize <br><br>
\thnormalsize bar

Could not make that work.  No errors, Therion just echos what is typed in
the text string.
Some examples of what I tried...

-text "25 <\thtinysize> P" -scale l
-text "25 \thtinysize P" -scale l
map-comment "NZVD2016 / New Zealand Vertical Datum 2016 \thtinysize <br>This
map represents..."

Perhaps there is a way to force interpretation of part of a text string as a
tex control?

Bruce