# ResMan/2  Experimental Live Resolution Switching

Copyright  2026 J.P.M.  
License: Freeware

ResMan/2 allows you to change screen resolutions under OS/2 and ArcaOS on the fly, without rebooting.

The program uses native Presentation Manager and low-level graphics interfaces. No system DLLs or graphics drivers are replaced.

## Installation

Extract both files into the same directory:

- `RESMAN.EXE`  The main application with the graphical user interface.
- `RESHELP.EXE`  The helper executable used internally for low-level resolution switching and recovery.

**Always start ResMan/2 by running `RESMAN.EXE`.**

`RESHELP.EXE` is launched automatically when needed. It is not a standalone application and has no useful functionality when started independently.

No additional OpenWatcom runtime libraries are required.

## Usage and Recovery

Select the desired screen resolution and click the switch button.

To restore the original resolution, press **ESC** while the ResMan/2 window has focus.

If recovery is not possible, a reboot should restore the resolution configured in the native OS/2 display settings.

ResMan/2 does not permanently change the system's configured screen resolution.

## Compatibility

Tested exclusively with ArcaOS 5.1.2 under VirtualBox using VBox GenGRADD.

Bare metal, Panorama and SNAP have not been tested.

## License

ResMan/2 is distributed as freeware and may be used free of charge.

Copyright  2026 J.P.M. All rights reserved.

## Disclaimer

This software is provided "AS IS", without warranty of any kind.

Use it entirely at your own risk. The author assumes no liability for any damage, data loss, system instability or other problems resulting from its use.

**Testing in a virtual machine is strongly recommended. Not intended for production environments.**