Fit bigger font in text box

Text box height 5%%, font size 13, then font is fitted in the text box. but when height is 4% and font size 13, then full font not showing. How to show full font size in the text box without increase height.

You should reduce/increase the font height according to the height and width of the component

where is the option to increase font height? [do not tell the font size option]

Unfortunately that is the option…