The Air Command window on Samsung Galaxy Note devices makes it easy to access all of the features that the S Pen has to offer, such as Action Memo, which turns your handwritten notes into actionable links, and Pen Window, where you can draw a square on the screen to open a certain application.
While this quick-access is certainly useful, the Air Command popup window is fairly bland in the looks department. It just comes in one flavor: a white background with black icons and blue highlights.
Noted Galaxy developer xperiacle, who has previously given us a mod to launch floating windows from the sidebar on the Note 3, now brings another feature to the famed phablet allowing us to theme the Air Command controller window for a customized and not-so-drab look.
As is the case with all Xposed mods, your Galaxy Note 3 will need to be rooted for this to work. You'll also need to download and install the latest version of Xposed Installer on to your device, if you haven't already done so.
Make sure to have installation from "Unknown sources" enabled, then download and install Air Command Themer to your device. After it's installed, go to the Xposed Installer app, head to the Modules" section to check the box next to "Air Command Themer," then "Soft reboot" your device from the Framework section.
Before you can change the theme of Air Command, you'll need to find and download some. Below, I've compiled some of my personal favorites, but you can check this XDA thread and this Dropbox cache for more themes.
All you have to do is download a theme and install it like you would any other app—skip to Step 4 once you've installed all the themes you want.
Open the Air Command Themer app to check out how all of the themes you've downloaded will look, then select a theme and tap "OK" when it prompts you to apply it. After you've set a theme, reboot your device.
When you're device is back up, remove the S Pen so you can view your newly themed Air Command window.
To go back to the stock Air Command theme, just go to Air Command Themer and select the "Android System" theme, then reboot your device.