If the Twitter URL is not already configured, then after clicking on the Twitter icon in the Web Player, a blank dialog box appears as below:
For Spotfire 7.0:
1) Open "Web.config" file present inside the installation directory of Spotfire Web Player 7.0.
2) Search for the "publicUrlForTwitterShares" tag.
3) Enter a public Web Player URL as the value for the tag using the syntax shown here:
publicUrlForTwitterShares="http://X.X.X.X:8089/SpotfireWeb"
4) Restart your Spotfire Web Player application pool.
5) You can also hide/unhide the Twitter option by enabling/disabling the "showShareWithTwitter" tag.
For Spotfire 7.5 and above:
publicUrlForTwiterShares tag is not applicable/valid anymore from Spotfire 7.5 version and above. You will get the "showShareWithTwitter" tag inside the Spotfire.Dxp.Worker.Web.config file for hide/unhide of the Twitter option.