I opened the html file on the web server using the URL action,
but when I performed a URL action with a different button, the link was overwritten on the same tab.
I want to open individual links with a new tab.
I set a link like http: // myserver ~~~~~~~.html? linktarget = _blank, but it did not work.
Please give me some advice.
According to this KB article Opening Links In Separate Browser Windows or Tabs | Tableau Software you need to put the linktarget=_blank parameter on the URL of the page containing your URL Actions, not in the Action URLs themselves.