TrueRotate

A modern Windows display-rotation tray app that fixes the NVIDIA mouse-axis bug.

⬇ Download the latest release — a modern, open-source replacement for the old iRotate.

TrueRotate lives in your system tray and rotates any monitor (0° / 90° / 180° / 270°) from a global hotkey or the tray menu. It's a modern replacement for the old iRotate utility, built to solve the one problem iRotate never could:

After the NVIDIA app touches any display setting, rotating a display leaves the mouse moving along the wrong axis, with parts of the screen the cursor can't reach ("dead zones"). The breakage is semi-permanent — it survives reboots.

TrueRotate neutralizes this on every rotation. See How the fix works.

Features

• Global hotkeys — Ctrl+Alt+Shift+Arrow → 0/90/180/270° by default; fully rebindable.
• Tray menu — rotate any monitor directly via per-monitor submenus.
• Per-monitor memory — remembers each monitor's orientation (keyed by a stable device id) and restores it.
• Auto-reapply — when something resets a monitor's orientation (e.g. the NVIDIA app), TrueRotate restores your chosen orientation automatically, through the cured path. See Rotate with TrueRotate, not other tools.
• Rotate target — hotkeys act on the monitor under the cursor, the primary monitor, or all monitors (your choice).
• Start with Windows — optional autostart.
• No admin required.

Install & run

Requirements: Windows 10/11. (Developed and verified on an NVIDIA GPU; works on any GPU.)

Easiest — prebuilt: download the latest release, extract the zip anywhere, and run TrueRotate.exe. No installer, no admin, no .NET runtime needed (self-contained).

Or build from source — needs the .NET 10 SDK:

dotnet build -c Release
# → bin/Release/net10.0-windows/TrueRotate.exe

Or produce a standalone exe that needs no installed runtime:

dotnet publish -c Release -r win-x64 --self-contained

Run TrueRotate.exe. It starts in the system tray — check the hidden-icons ^ overflow and drag it out to keep it visible.

Usage

Hotkeys (default)

Hotkey	Rotation
Ctrl+Alt+Shift+↑	0° (landscape)
Ctrl+Alt+Shift+→	90°
Ctrl+Alt+Shift+↓	180°
Ctrl+Alt+Shift+←	270°

By default a hotkey rotates the monitor under your cursor.

Tray menu

Right-click the tray icon: per-monitor rotation, Settings…, Auto-reapply toggle, and Exit.

Settings

Open Settings… from the tray to:

• Rebind each rotation hotkey (click Rebind, then press the combo).
• Choose the rotate target: cursor monitor / primary / all monitors.
• Toggle Start with Windows.
• Toggle Auto-reapply on display change.

Settings are stored in %AppData%\TrueRotate\config.json.

⚠️ Rotate with TrueRotate, not other tools

TrueRotate enforces the orientation you set in it. If you rotate a monitor through the NVIDIA app or Windows Settings, TrueRotate reverts it to the orientation you last set in TrueRotate.

This is deliberate. Other tools rotate without applying TrueRotate's cursor cure, so they would bring the mouse-axis bug back. By reverting and re-applying through its own cured path, TrueRotate keeps the cursor correct.

So change orientation from TrueRotate (hotkey or tray menu), not from external tools. If you really need an external tool to change orientation, turn Auto-reapply off first (tray menu or Settings).

How the fix works

On an affected machine, a plain rotation updates the displayed image and every Windows orientation value (CCD, GDI bounds, and legacy DEVMODE all agree) — but the mouse cursor's coordinate transform is not rebuilt, so the cursor stays mapped to the old orientation (wrong axis + dead zones).

TrueRotate rotates via the CCD API with the SDC_FORCE_MODE_ENUMERATION flag, which forces a mode re-enumeration and rebuilds the cursor transform on every rotation — neutralizing the bug rather than trying to remove it. (Legacy ChangeDisplaySettingsEx is blocked by the driver, so CCD is the only working route.)

Full technical write-up: DESIGN.md.

CLI

The same executable doubles as a CLI for verification/recovery (output appears in the launching terminal):

TrueRotate.exe list                        # list monitors + current rotation
TrueRotate.exe set <index> <0|90|180|270>  # rotate a monitor
TrueRotate.exe test <index>                # round-trip rotation self-test

Limitations

• The Win key can't be used as a hotkey modifier (a WinForms key-capture limitation).
• Developed and verified on an NVIDIA RTX 5060 Ti, dual-monitor setup.

License

MIT © 2026 BK927

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_{Keywords: Windows screen rotation · rotate display with a hotkey · NVIDIA rotation mouse wrong-axis / wrong-direction fix · dead-zone after rotating · portrait monitor · multi-monitor rotation · system-tray display rotator · iRotate alternative for Windows 10/11 · WinUI 3 utility.}