How do I resize text in a Text object?

According to the Text object manual, this object does not display anything if its bounding rectangle is too small to fit a single letter of text.

Is there a way to resize the text in the Text object, so it will be smaller and fit?

Use the action "Set font size".

Text plugin manual article

Use the action "Set font size".

But how do I know what size to use? My text is dynamic, and I want the largest possible font size.

You know the size in pixels of your text object. You can know the number of characters of your text thanks to the system expression "len()".

Divide one by the other, and you should be able to determine the text size you need.

You know the size in pixels of your text object. You can know the number of characters of your text thanks to the .

Divide one by the other, and you should be able to determine the text size you need.

I don't think you are correct.

Yes, I know the size in pixels of the text object.

Yes, I know the number of characters of the text line.

From this, I can tell what size in pixels each char should be, but this is not the correct value of the "font size" to be used.