text width in textedit or another program
If I understand you correctly, you want your text to increase in height but not in width. The typical text editor/word processor doesn't support this, there are at least two options you could investigate on


Get a proper word processor (Pages, LibreOffice, MS Word) and either pick or install a font which matches your need
Get a drawing app which allows you to stretch images (a lot of them do) from the App Store