Where die you change the preferences as the single line composer is not part of the preferences but part of the paragraph definition, which should be fixed in a Paragraph Style.
Where do you reduce the kerning? In the Paragraph Style?
Was the single line composer applied as part of the style, or if not, to selected text? If not one or the other it will not apply.
Thank you! That worked. I was hoping to apply it to the whole document at once, and have it be the default. Maybe it will do that next time I create a document.
I just selected the line I wanted to change and hit option-arrow key, I didn't change the letter spacing in the style sheet.
Yes, I see that it does work if I select it in the style sheet. I had selected it in Preferences, where it had no effect at all.