After changing e.g. the font color no “Save” button appears, so I am not able to save my changed settings. I tried in Safari/FF/Chrome but the “Save” button does not appear. Is that an know issue?
The Opt-out iframe customizer just changes the parameters to the iframe.
So if you want to apply the changes you need to replace your opt-out iframe with one where the src has the wanted colors as get-parameters:
You can copy it from the box below, but keep in mind that you also need to close the iFrame (
</iframe>), but this will be fixed in the next release.