Hi @jhotujec, the only way to do this currently is by inserting some custom code.
Here is an example, which you can copy into your </body>
code section.
<script>
$('.custom-button').on('click', function (evt) {
$('.target-tab-link').triggerHandler('click');
evt.preventDefault();
});
</script>
Then in the webflow designer, you would need to assign these special classes (without the leading dot) to the respective elements:
Custom button: custom-button
Target tab link: target-tab-link
Hope that helps!