FontParams.Size := 24;
FontParams.Color := clTeal;
FontParams.Style := [fsBold, fsUnderline];
FontParams.Name := 'Segoe UI';
str := FormatDateTime('dddd mmmm dd yyyy hh:mm', Now) + LineEnding;
InsertFontText(RichMemo1, str, FontParams, -1);
RichMemo1.SelStart := Length(RichMemo1.Lines.Text);