SetFontSize
function SetFontSize(FontSize: hps = null): ApiRange | "null"Description
Sets the font size to the characters of the current text Range.
Parameters
The text size value measured in half-points (1/144 of an inch).
Returns
ApiRange | "null"Try It
var oDocument = Api.GetDocument();
var oParagraph = oDocument.GetElement(0);
oParagraph.AddText("ONLYOFFICE Document Builder");
var oRange = oDocument.GetRange(0, 24);
oRange.SetFontSize(14);