The AcyMailing Assignment lets you assign boxes to AcyMailing Lists that the user has subscribed to. A great tool to exclude visitors and users who are already a part of your newsletter audience.
In the table below you can see which options are available to setup the AcyMailing Assignment.
Click in the textfield so a selectbox pops up from which you can filter the AcyMailing Lists that you'd like by typing on the fly.
Once you select one you can continue typing to find the next one and so forth.
As opposed to most of the assignments who would mainly be used for when you want your box to be displayed, the AcyMailing Assignment has a lot more sense in being used for when you want to exclude users and visitors who have already subscribed to your mailing lists.