Custom Button = Field don't refresh after the action

Custom Button = Field don't refresh after the action

Good morning Zoho Community!

Brand new user and first ever question here! :)

I successfully create my first custom button who update a field (it's the follow-up date). The button is in the Lead's page.  But, I'm force to refresh the page manually to see the updated date.  How can I proceed to see the field updated without refresh the webpage (F5).. ?
Thanks!

Robert