Ultimate R36S Hotkey Guide: Master Your Handheld

Below is our bench-tested reference to R36S shortcut keys, standalone emulator exceptions, and quick recovery steps when R36S hotkeys stop responding. If you are still comparing hardware specs before buying, check our hands-on R36S review first.

1. What makes the Fn button the most important key on your R36S Hotkeys list?

The center Fn button (or Select on older builds) acts as the ArkOS Hotkey Enabler, turning gameplay buttons into system commands for saving and quitting.

The Architecture of ArkOS Shortcuts

Unlike a smartphone or a modern Nintendo Switch, a compact retro handheld cannot spare faceplate space for separate Home, Screenshot, Brightness, and Fast-Forward buttons. Instead, ArkOS hotkeys R36S configurations rely on a two-layer input system documented in the Libretro input and hotkey controls guide. During normal gameplay, pressing Start, R1, or X sends standard controller inputs to your game. Hold down the designated Hotkey Enabler button first, and those exact same buttons trigger system-level R36S shortcuts instead.

Identifying Your Function Key (Fn vs. Select)

Depending on when your console was assembled and which firmware image lives on your MicroSD card, your R36S controls use one of two buttons as the Hotkey Enabler:

• Community AeolusUX ArkOS 2.0 Builds (2025–2026 Standard): The small round R36S Fn button in the dead center between Select and Start is mapped as the primary Hotkey Enabler (Fn+Start quits games, Fn+X opens RetroArch).
• Older Stock Factory Images & Original Christian Haitian ArkOS: On early factory cards, the center Fn key was left unmapped in the device tree, so the Select button serves as the Hotkey Enabler (Select+Start quits games, Select+X opens RetroArch).

Bench Tip: If pressing Fn+Start does not exit your game, immediately try pressing Select+Start twice in a row, as older factory ArkOS images assign Select as the Hotkey Enabler instead of Fn.

Why Context Matters: EmulationStation Menu vs. In-Game

Your R36S button shortcuts behave differently depending on whether you are browsing the main EmulationStation console list or actively playing inside an emulator core. Table 1 shows how each physical button changes role once you hold down Fn (or Select) inside a game.

"Tested on our unit" means we checked it on a device we own. "Manufacturer spec" means the maker states it and we haven't verified it ourselves. "Community reports" means players report it, and results can vary.

Knowing where the front face buttons, clickable L3/R3 thumbsticks, and rear L1/L2/R1/R2 shoulder triggers sit makes two-button combos effortless even in a dark room:

Common Button Confusion Between Stock and Community Builds

Many players accidentally press the physical Reset button on the side of the shell (right below the Power button) thinking it is a "Menu" or "Back" key. Pressing Reset cuts power to the CPU immediately, which can corrupt your active save file. Always use software R36S shortcuts (Fn+Start or Select+Start) to exit back to the menu before shutting down.

2. How do I exit games and manage save states using R36S Hotkeys?

Press Fn + Start (or Select + Start twice) to exit games cleanly, and pair Fn + R1 with Fn + L1 for instant save states.

Exiting the Game: The Golden Combo

Nothing is more important for MicroSD card longevity than exiting your emulator cleanly before turning the handheld off. Follow this three-step routine at the end of every play session:

1. Exit the Active Game to EmulationStation

   Hold Fn+Start simultaneously (or press Select+Start twice if Confirm Quit is enabled) so RetroArch flushes your .srm battery save to the MicroSD card.

2. Open the EmulationStation System Menu

   Once you are back on the main console list, press Start by itself to open the top-level ArkOS system menu.

3. Run Software Shutdown Before Flipping Power

   Navigate to Quit -> Shutdown System and wait 5 seconds for the screen and LED to turn off completely instead of holding the physical power button.

The Magic of Save States (The R36S Save State Shortcut)

Classic 8-bit and 16-bit cartridges often forced you to replay an entire stage if you ran out of lives. With the R36S save state shortcut, you can freeze and restore system RAM at any frame using these four core combinations:

R36S Save State & Quick Menu Shortcuts

Fn+R1	Save Current Progress: Writes an instant state snapshot to the active slot
Fn+L1	Load Saved Progress: Restores the snapshot from your active save slot
Fn+Right / Left	Change Save Slots: Cycles across Slot 0 to Slot 999 before boss fights
Fn+X	RetroArch Quick Menu: Opens per-game shaders, controls, and save state thumbnails

Rotating across three or four save slots (Slot 0, Slot 1, Slot 2) prevents you from accidentally overwriting a good checkpoint right before a difficult boss encounter. Watch the quick visual demonstration below to see how in-game saves and state slots work together:

3. Why are brightness and volume controls vital R36S Hotkeys for portable gaming?

Adjusting backlight levels with the R36S brightness shortcut (Fn + Volume Up/Down or R3 + D-Pad Up/Down) reduces eye strain and adds 90 minutes of battery.

Controlling Screen Brightness (The R36S Brightness Shortcut)

The 3.5-inch 640×480 IPS display on the R36S is remarkably bright, drawing significant current from the 3,200mAh battery when set to 100%. Because there is no dedicated brightness wheel on the shell, you use the R36S brightness shortcut:

• On Updated AeolusUX ArkOS 2.0 Builds: Hold Fn and press Vol + to raise brightness, or hold Fn and press Vol - to dim the panel.
• On Original ArkOS / Select-Mapped Builds: Hold R3 (click the right analog stick inward) and press Up or Down on the D-Pad, or hold Fn+Up / Down.

Volume Management and Checking Your FPS

Dedicated Vol + and Vol - rockers sit on the left edge of the R36S housing for instant audio control without needing a modifier key. If you want to verify how smoothly a 3D PlayStation 1 or Nintendo 64 title is running, press Fn+Y inside any RetroArch core to toggle the real-time FPS (Frames Per Second) counter in the corner of the screen.

Why Marketplace Clone Consoles Ignore Fn Shortcuts: Many shoppers who buy ultra-cheap R36S knockoffs on third-party marketplaces discover that Fn+Start, brightness shortcuts, and save states fail to work out of the box because the unit is actually a single-RAM clone running a locked EmuELEC build. If you want a bench-verified R36S with genuine dual-RAM RK3326 hardware and pre-mapped ArkOS 2.0 shortcuts ready to play, compare our verified edition below:

4. Where is the ultimate R36S Hotkeys cheat sheet for every emulator?

RetroArch cores share one unified Fn or Select shortcut table across 15 classic consoles, while standalone PSP, DS, and N64 emulators use dedicated menu keys.

The 2BlueBox Master Cheat Sheet

Keep this visual reference card and Table 2 bookmarked on your phone whenever you play NES, SNES, Game Boy, GBA, Sega Genesis, Arcade (CPS1/CPS2/Neo Geo), or PlayStation 1 games via RetroArch. These global mappings are verified against the official ArkOS global event keys documentation.

Table 2 lists all twelve global R36S hotkeys side-by-side for both community Fn builds and classic factory Select builds:

"Tested on our unit" means we checked it on a device we own. "Manufacturer spec" means the maker states it and we haven't verified it ourselves. "Community reports" means players report it, and results can vary.

Emulator Specific Exceptions (PSP, Nintendo DS & N64)

To squeeze maximum speed out of demanding 3D systems on the Rockchip RK3326 chip, ArkOS bypasses RetroArch and launches standalone emulators (PPSSPP, DraStic, and Mupen64Plus). Because standalone emulators use their own input drivers, as detailed in the official PPSSPP control mapping documentation, their menu keys differ from standard RetroArch cores:

Use Table 3 whenever you launch PSP, Nintendo DS, N64, Dreamcast, or Pico-8 titles from our 15,000+ R36S games list:

"Tested on our unit" means we checked it on a device we own. "Manufacturer spec" means the maker states it and we haven't verified it ourselves. "Community reports" means players report it, and results can vary.

5. How can you fix common issues when R36S Hotkeys stop responding?

Unresponsive R36S hotkeys are usually caused by a reset RetroArch input config, accidental EmulationStation Kiosk Mode activation, or a failing stock MicroSD card.

When a button combination stops registering, walk through these four diagnostic checkpoints in order from fastest software check to MicroSD replacement:

Scenario 1: The Function Key Is Not Mapped in RetroArch

If you accidentally clicked Reset to Default Controls inside RetroArch, your console forgets which button is the Hotkey Enabler. To re-map your R36S Fn button:

• Step 1: From the main EmulationStation list, scroll to the RetroArch section and launch RetroArch (and RetroArch32) directly without loading a game.
• Step 2: Navigate to Settings -> Input -> Hotkeys.
• Step 3: Select Hotkey Enable, hold down the center Fn button (or Select) until it binds (Button 16 or Button 8), then back out to Main Menu -> Configuration File -> Save Current Configuration.

Scenario 2: You Are Stuck in "Kiosk" or "Kid" Mode (The R36S Kiosk Mode Fix)

One of the most frequent panic messages we receive is: "When I press Start on the main menu, almost all settings are missing and I cannot open Options or Quit!" This happens when someone accidentally switches the User Interface Mode to R36S Kiosk Mode or Kid Mode, which hides system menus to prevent children from deleting games.

• Method A (The Instant Controller Passcode): While sitting on the main EmulationStation console selection screen, input the classic Konami-style ArkOS unlock sequence using the D-Pad and face buttons: press Up, Up, Down, Down, Left, Right, Left, Right, B, A. The screen will blink and restore Full UI mode immediately.
• Method B (Editing es_settings.cfg on a PC): If the button code does not register, power off the console, insert the card into your PC, or use the File Manager to open /home/ark/.emulationstation/es_settings.cfg, change <string name="UIMode" value="Kiosk" /> to <string name="UIMode" value="Full" />, and save.

Quick Reminder: To unlock R36S Kiosk Mode or Kid Mode without a computer, stand on the main EmulationStation screen and press Up, Up, Down, Down, Left, Right, Left, Right, B, A on the D-Pad and face buttons.

Scenario 3: Corrupted Factory MicroSD Card or Outdated Firmware

When an unbranded stock MicroSD card starts developing bad sectors, RetroArch fails to write its .cfg hotkey files and freezes whenever you press Fn+Start. Flashing the latest community build from the AeolusUX ArkOS-R3XS release repository onto a genuine SanDisk or Samsung card permanently fixes broken Fn key mappings. Follow our step-by-step R36S ArkOS update guide and keep our R36S black screen fix guide handy to match your Panel 1–4 .dtb file.

Scenario 4: The Physical Button Is Stuck or You Are Using a Frozen Game State

If a single game locks up and ignores Fn+Start, load the game from its normal title screen instead of pressing Fn+L1, as loading a corrupted save state will re-trigger the freeze every time.

Whether you want a pocket-sized ArkOS handheld with pre-mapped Fn shortcuts for your daily commute or a 2-player wireless TV stick for family couch co-op, compare our two most popular plug-and-play setups below or explore our full retro handheld console collection:

Frequently Asked Questions (FAQ)

My R36S is frozen and Fn + Start is not working. What should I do?

If the emulator is completely locked up and neither Fn+Start nor Select+Start responds, hold the physical Power button on the left edge for 8 to 10 seconds to force a hardware shutdown. On reboot, launch the game normally from the title screen rather than loading your last save state, as the save state itself may have captured the crash.

Can I change the R36S hotkeys to different buttons?

Yes. Open RetroArch from the main EmulationStation system list, navigate to Settings -> Input -> Hotkeys, and remap Save State, Load State, Fast-Forward Toggle, or Quit to any button you prefer. Always go to Main Menu -> Configuration File -> Save Current Configuration before exiting so your changes stay permanent.

Does the R36S have a sleep mode hotkey?

Yes. Tapping the physical Power button once briefly puts ArkOS 2.0 into standby sleep mode and turns off the IPS backlight, and tapping Power again wakes the screen within two seconds. For overnight storage, always exit your game with Fn+Start and run a full system shutdown to prevent battery drain.

Why do my hotkeys work in Game Boy and PS1 games but not in PSP or Nintendo DS games?

Game Boy, SNES, Genesis, and PlayStation 1 cores run inside RetroArch, which uses the global Fn (or Select) hotkey system. PlayStation Portable (PPSSPP) and Nintendo DS (DraStic) use standalone emulators for higher 3D speed; in PPSSPP and DraStic, press the Fn button (or click L3/R3) by itself to open the standalone emulator menu.

How do I exit Kiosk Mode or Kid Mode on my R36S?

Stand on the main EmulationStation console list and press Up, Up, Down, Down, Left, Right, Left, Right, B, A using the D-Pad and face buttons. The interface will refresh and restore the full Start menu (UI Settings, Quit, and Options) immediately.

How do I take a screenshot on my R36S handheld?

Inside any RetroArch emulator core, hold Fn (or Select) and tap the Power button briefly. The console saves a PNG screenshot into the /screenshots/ folder on your EASYROMS MicroSD partition.

Conclusion

Mastering your R36S hotkeys transforms this pocket Linux handheld from a confusing gadget into a dependable time machine. Once Fn+Start (quit), Fn+R1 (save state), Fn+L1 (load state), and the Kiosk Mode unlock code become muscle memory, you can jump across two decades of arcade and console history without ever losing a minute of progress.

Happy gaming, and always quit cleanly before flipping the power switch - Liam Parker, 2BlueBox Hardware Bench.

Further Reading & Resources

Technical References & External Sources · Click to expand

To verify the global event key mappings, RetroArch input drivers, and standalone emulator controls referenced in this guide, consult these external technical sources:

• ArkOS 2.0 Global Event Keys & Emulator Hotkeys Documentation: Official reference table for global hotkeys and standalone emulator exit commands maintained by Christian Haitian (ArkOS Global Event Keys Wiki).
• Libretro RetroArch Input & Hotkey Enable Architecture: Official documentation on how the Hotkey Enable modifier button layers system commands over standard gamepad inputs (Libretro Input and Controls Guide).
• AeolusUX ArkOS-R3XS Community Firmware (Fn Button Support): Community-maintained ArkOS 2.0 releases mapping the R36S center Fn button as the default hotkey modifier (ArkOS-R3XS GitHub Releases).
• Official PPSSPP Standalone Control Mapping Reference: Documentation for configuring in-game pause menus, frameskip, and custom button bindings on PlayStation Portable emulators (PPSSPP Controls Documentation).