In iNewsletter there is no option to directly change the font size of a block of text.
iNewsletter will automatically change the size of the font, depending on the device the newsletter is being read on to maximise readability. To do this, we have manually chosen font sizes and tested them across all kinds of mobile and desktop devices, and ensured they are clear and readable, while also taking into account other elements of the newsletter.
On a content page, there is 3 primary text boxes: the banner heading, the banner subheading and the body. Both the banner heading and the banner subheading have a fixed font size that can't be changed. The body section has multiple text styles that are explained below:
This is the default text style in the body section. Paragraph style text is best for article content and any long fragments of text.
Heading style text is great for article/section headings. It is a slightly larger font size than Paragraph text and has built in support to prevent widows/orphans in a multi-column layout.
Quote style text is great for drawing attention to a block of text. It is a slightly different colour to Paragraph text and has a slightly larger font size.
Any of these text styles can be chosen by highlighting some text in the body area and choosing the appropriate option from the floating formatting toolbar.