Can't make the single line font vertical center.

I have a single line text, as the picture you can see,

font-family: Segoe UI;

font-size:42px;

default line-spacing:56px;

default height:56px;

default type: point text;

Now, I want this text become 42px height, so I set the line-spacing to 42, nothing happened.

Then, I changed the text from point text to area text, and changed the height to 42px

As you can see, can't make it vertical center.

How can I get a single line text with 42px height and vertical center?