[Newbies] What is the regular way to create a StringMorph with a particular font size?

[H. Hirzel]

Hello

I am wondering how a short version of constructing a StringMorph with
a particular TextStyle looks like.

The version which is attached works fine.

The question is mainly

How do I replace

     (TextConstants at: #LiberationSans) fontArray at: 7

with something which directly refers to the point size?

And as a second question how do I get from the number of desired
screen pixels to the closest font size?

Regards
Hannes
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