You can edit the list of predefined font sizes offered on the Atlantis toolbars. Click the Font Sizes... button on the General tab of the Tools | Options... dialog.
Applying styles with the Format Brush
The Format Brush of Atlantis is a convenient mouse tool to apply font and paragraph formatting to an existing text. But the Format Brush can be also used to apply styles to paragraphs. Here is how to proceed:
Activate the Format Brush by clicking the corresponding toolbar button:
Choose "No formatting" from the drop-down list attached to the "Format Brush" toolbar button:
Pull down the "Style" toolbar combo box, and select any appropriate style:
Click in the target paragraphs one by one or select them in the document in any other way to apply the selected style.