7) Set up always-on display
THe S8's AMOLED screen only uses juice to power the pixels that are lit up - not the whole panel. That's why you should enable the Always-on display: it'll barely drain any battery, but will save you from constantly turning the screen on just to check the time or see what notifications have just come through.
Head to Settings -> Lock Screen & Security and tap Always On Display. You can turn it on at the top, pick which content to show (the digital home button, the clock, or both), and pick a style. If you don't need a clock, you could swap it for a calendar or a picture.
You can also set Always On Display to run on a schedule here, so it's not keeping you up at night (or using battery when you don't want it to).
8) Take screenshots the right way
With no physical home button, screenshots are handled a little differently on the S8 to previous Galaxy phones.
You can press the power and volume down keys at the same time, or you can enable swipe gestures by heading to Settings -> Advanced features and turn on Palm swipe to capture.
There's also a third way: using the Smart Select app, which is hidden away in the Edge Panels that pop out from the side of the screen. This'll let you choose the whole screen, or just a portion of it, and even record GIFs of any video that's playing so you can share it straight away. It was enabled by default on our review unit, but you can turn it on manually by going to Settings -> Display -> Edge Panels.
9) Change display resolution
That gorgeous 2960x1440 resolution screen you've got sat in front of you? Yeah, the Galaxy S8 isn't actually rendering at that resolution at all. It defaults to full HD, in order to save battery power.
If you want to get full use out of all those pixels you've just paid for, you can head to Settings -> Display -> Screen Resolution and force it to run at WQHD+. Or, if you want to go the other way, you can drop things down to HD+ and save even more of that precious smartphone juice.
10) Change the theme
The latest version of Touchwiz is a genuine improvement on previous efforts, but not everyone will like the way it looks. Fortunately, you can change all that with a Theme, without having to install a completely new Android launcher.
There are plenty to choose from, with both free and paid entries available to download, and many will also include new icons, new looks for pre-installed Samsung apps, and matching Infinity wallpapers that animate in the background.
Go to Settings -> Wallpapers and themes, and give a few a try. They can completely transform the look and feel of your phone - not bad for a few taps.
11) Get the best audio with Adapt Sound
The Galaxy S8's AKG in-ears are some of the best bundled headphones we've tried, but there's always room for improvement. Samsung's Adapt Sound has been around for a while now, but it's always worth turning on - it creates a custom EQ profile just for your ears and headphones, making your tracks sound crisper, clearer and more precise, without the need to spend big bucks on expensive headphones.
Go to Settings -> Sounds and Vibration -> Sound quality and effects, and scroll down to Adapt Sound. This will then walk you through a sound test, where you listen out for beeps at different pitches. Just tap yes or no if you can hear them or not, and make sure you're somewhere quiet while you're doing it.
At the end, you'll have a custom EQ setting tweaked especially for you.
12) Turn on one-handed mode
Not everyone will be able to reach the top of the 5.8in Galaxy S8, and even fewer will have the dexterity to stretch to the top of the 6.2in S8 Plus, so you might want to turn on the very handy one-handed mode and give your digits a rest.
Go to Settings -> Advanced -> One-Handed Mode to turn it on. You can toggle it with either a diagonal swipe from the bottom corner, or by triple-tapping the home button. It'll shrink the screen and make things much easier to reach.
13) use Multi-Window
The S8's 18.5:9 aspect ratio comes in handy for multi-tasking, letting you pin part of one app to the top while you work on another below it.
Say you're watching a YouTube clip. Tap the Recents onscreen navigation key, and then tap the square icon that appears next to the X. This'll let you drag a box around a portion of the screen, so that your video continues to play while you're using Twitter or Instagram below it.
Traditional split-screen is here, too. You can activate it from the Recents menu too, or you can turn on a shortcut by going to Settings -> Advanced features -> Multi Window. Toggle on "Use Recents Button" and you'll be able to turn any app into split screen just by pressing and holding the Recents key.