Typo3 tt_news singleView resize image

I had problems in resizing the image displayed in the single view of tt_news(3.0.1). Using the maxWidth function didn't make thinks better. It seems I had to write in the setup the following line:
plugin.tt_news.displaySingle.image.file.width = value

Of course, you will replace "value" with the desired size.

This may sound stupid, but it took me a while to figure it out.