How To Enable All Apps for Multi-Window! [Multi-Window Manager App]
For those of you with a Galaxy S4, Note 2, S3, Note 10.1, or Note 8.0, there’s an easy way to enable all apps for multi-window now using the Multi-Window Manager App. Before, the user had to install a custom ROM or a multi-window MOD to make this work but with the app, all you need is root.