This file shows how to change the textformat using a button and how to scroll text with a button.

Script

Text sizing

                    //Loading the text file. For Flash MX //movies use only loadVars and give the textfield an instance name. //Do not use loadvariables.

                    
loadVarsText = new loadVars();
loadVarsText.load("text.txt");
loadVarsText.onLoad = function(success) {
    if (success) {
        headline.html = true;
        headline.htmlText = this.headText;
                    //We format the textfield.

        headline.border = true;
        headline.borderColor = 0xff0000;
        headline.background = true;
        headline.backgroundColor = 0xffff00;
                    //we set the textsize.

        myTextFormat = new TextFormat();
        myTextFormat.size = 14;
        headline.setTextFormat(myTextFormat);
    }else{
        trace("text not loaded,try again")
    }
}

Text size button

                    //We reset the textsize.

on (release) {
    myTextFormat = new TextFormat();
    myTextFormat.size = 18;
    headline.setTextFormat(myTextFormat);
}

In the button change format add the following script:

on (release) {
    myTextFormat = new TextFormat();
    myTextFormat.size = 18;
    _root.headline.setTextFormat(myTextFormat);
}

The script for the two scroll buttons is this:

on (release) {
    _root.headline.scroll = headline.scroll + 1;
}

and for the lower button

on (release) {
    _root.headline.scroll = headline.scroll - 1;
}