HI,
You can set an html to your text component, with a font size and change this html using mouseIn and mouseOut events. For example:
$w('#text1').html = '<p><span style="font-size:40px">Your text</span></p>'
export function text1_mouseIn(event, $w) {
$w('#text1').html = '<p><span style="font-size:80px">Your text</span></p>'
}
export function text1_mouseOut(event, $w) {
$w('#text1').html = '<p><span style="font-size:40px">Your text</span></p>'
}
Good luck