Optional extensions are used to manage specialized behaviors such as overscrolling, VM buffering management, and disabling scratch disk compression.

Note:

In past versions, customers could install extension plug-ins on Mac OS and registry keys on Windows to manage specialized behaviors. These old plug-ins and registry keys no longer function, and they return the following error if you install them: "Could not load the [plug-in name] module because it does not work with this version of Photoshop."

Note:

It's never a good idea to manually drag plug-ins from a previous version of Photoshop’s Plug-ins folder to your current version’s Photoshop Plug-Ins folder. For more information, see Photoshop plug-ins troubleshooting.

How to enable extensions

  1. Use Notepad (Windows) or a text editor on Mac OS to create a plain text file (.txt).

  2. Use this chart to enter the required text to enable your desired setting:

    Name Required Text
    Disable Async IO AllowAsyncIO 0
    Disable Reduce User Experience Friction ReduceUXFriction 0
    Disable VM Buffering VMDisableBuffering 1
    Force VM Buffering VMForceBuffering 1
    Disable Scratch Compression VMCompressPages 0
    Overscroll Always OverscrollAlways 2
    Remember Slow Files RecentFilesSlowTimeout 1200
    Turn on Legacy Healing Brush LegacyHealingBrush161 1
    Turn off System Stylus UseSystemStylus 0
    Turn on RealTimeStylus uRTS 1
    Unlimited Preview Size
    FullPreviewMaxSize 32767

    Note:

    Example: Type the following text:

    # Force VM Buffering
    VMForceBuffering 1

    into the text file. Put each setting's required text on a new line in the text file.

  3. Save the file as "PSUserConfig.txt" to your Photoshop version settings folder: 

    • Windows[Installation Drive]:\Users\[User Name]\AppData\Roaming\Adobe\Adobe Photoshop CC 2015\Adobe Photoshop CC 2015.5 Settings\
    • Mac OS: //Users/[User Name]/Library/Preferences/Adobe Photoshop CC 2015.5 Settings/
    Note: Some files and folders are hidden on Windows. See Show hidden files and folders in Windows 10 and earlier for more information.
     
    Note: The user Library folder is hidden on Mac OS 10.7 and later. See Access hidden user library files | Mac OS X 10.7 and later for more information.

Extension descriptions and compatibility

Disable Async IO

Required Text Compatibility Old Plug-in Name
# Disable Async IO
AllowAsyncIO 0
  • CC (v14.1 or later)
N/A

Disable Reduce User Experience Friction

Required Text Compatibility Old Plug-in Name

# Disable Reduce UX Friction

ReduceUXFriction 0

  • CC 2015.5 (v17.0 or later)
N/A

When enabled, clicking on the canvas with an active Type layer will commit the text without having to hit Enter or Esc or click on the commit checkbox in the options bar.  Also attempting to move a ​Background layer will prompt with an option to Convert to Normal Layer.  Disabling this option will return legacy/default functionality.

Disable Scratch Compression

Required Text Compatibility Old Plug-in Name
# Disable Scratch Compression
VMCompressPages 0

  • CC (v14.1 or later)
DisableScratch
Compression.plugin

By default, Photoshop compresses pages before writing them to the scratch file. This compression does not result in a smaller scratch file since Photoshop must still reserve space for the uncompressed pages. For slow disk drives or SCSI implementations, however, the reduction in the data to be transferred to or from disk more than compensates for the time needed to compress or decompress the data. For fast disk drives and SCSI implementations, this is not the case. Disable Scratch Compression provides a slight performance improvement on machines with fast disk drives and SCSI implementations.

Disable VM Buffering

Required Text Compatibility Old Plug-in Name
# Disable VM Buffering
VMDisableBuffering 1

  • Mac only
  • CC (v14.1 or later)
DisableVMBuffering.plugin

When running on a Mac with more than 4 GB of RAM, Photoshop tells the OS to use the extra RAM as a buffer for the scratch file to speed up scratch file access. Disabling VM Buffering ensures that Photoshop doesn't access the extra RAM.

Force VM Buffering

Required Text Compatibility Old Plug-in Name
# Force VM Buffering
VMForceBuffering 1
 
  • Mac only
  • CC (v14.1 or later)
ForceVMBuffering.plugin

When running on a Mac with less than 4 GB of RAM, Photoshop does not tell the OS to use the extra RAM as a buffer for the scratch file to speed up scratch file access. Force VM Buffering forces Photoshop to access RAM for VM buffering.

Overscroll Always

Required Text Compatibility Old Plug-in Name
# Overscroll Always
OverscrollAlways 2
  • CC (v14.1 to 14.2.1 only)
Overscroll Always.plugin

Overscroll Always allows you to continue to pan a document even when outside the document bounds (marked by the default gray area surrounding the image boundaries). By default, images that fit within the document window cannot be overscrolled.

Note:

In current versions of Photoshop, a preference controls the overscroll behavior:

  • In Photoshop CC 2014, select Preferences > Interface and enable Overscroll.
  • In Photoshop CC 2015 and later, select Preferences > Tools and enable Overscroll.

Remember Slow Files

Required Text Compatibility Old Plug-in Name
# Remember Slow Files
RecentFilesSlowTimeout 1200

  • CC (v14.1 or later)
RememberSlowFiles.plugin

By default, Photoshop removes files from its recent file list if it ever takes longer than 20 ticks (1/3 second) to figure out where the file is when the list is updated after you open or save a file. Some removable devices and some network drives may take longer than this. Remember Slow Files prevents the recent file list from forgetting about files that take too long to resolve when the list is updated (it allows up to 20 seconds). However, saving or opening a file may take longer if this plug-in is installed.

Turn on Legacy Healing Brush

Required Text Compatibility Old Plug-in Name
LegacyHealingBrush161 1
  • CC 2015.1 (16.1.x only)
N/A

Note:

In Photoshop CC 2015.5 or later, you can revert to the legacy Photoshop CC 2014 behavior for the Healing Brush tool by enabling Preferences > Tools > Use Legacy Healing Algorithm For Healing Brush.

Photoshop CC 2015 introduced a new real-time healing brush algorithm. However, some users prefer the old healing brush algorithm and/or feedback. There are three options for controlling the Healing Brush behavior in CC 2015.1.x:

0 - Photoshop CC 2015 real-time algorithm with real-time user interface feedback

1 - Photoshop CC 2014 and earlier healing brush algorithm (Legacy) with non-real-time user interface feedback

2 - Photoshop CC 2015 real-time algorithm with no real-time user interface feedback 

Note:

Note: In Photoshop CC 2015.1, a new Diffusion slider was introduced, which allows you to achieve results similar to the legacy algorithm. See Healing brush examples for more information.

Turn off System Stylus

Required Text Compatibility Old Plug-in Name
# Use WinTab
UseSystemStylus 0

  • Windows only
  • CC 2014 (v15.x or later)
N/A

On Windows 8 or later, Photoshop (CC 2014 or later) uses Windows Ink to control the interaction of Photoshop and a stylus device. Using Windows Ink gives you better stroke results and allows you to use your tablet PC or convertible device without having to install a driver.

If the tablet uses a WinTab driver and does not have an option to use Windows Ink, or if you encounter other issues, you can use Turn off System Stylus to force Photoshop to use WinTab.

See Tablet support for Photoshop for more information.

Turn on RealTimeStylus

Required Text Compatibility Old Plug-in Name
# Allow RTS
uRTS 1

  • Windows only
  • CC (v14.2.x only)
N/A

When you run Photoshop CC (v14.2.x) on Windows 8.x, Photoshop uses Microsoft’s Wintab technology to control the interaction of Photoshop and a stylus device. If your tablet has issues when using WinTab, you can use Turn on RealTimeStylus to force Photoshop to use Windows Ink, which can give your stylus better performance.

See Tablet functions don't work in Photoshop (v14.2.x) | Windows for more information.

Unlimited Preview Size

Required Text Compatibility Old Plug-in Name
# Unlimited Preview Size
FullPreviewMaxSize 32767

  • CC (v14.1 or later)
Unlimited Preview Size.plugin

If you have the Full Size option for Image Previews turned on in the Saving Files preferences, Photoshop limits the size of the preview to 512 x 512 pixels. Unlimited Preview Size removes the 512 x 512–pixel limit on file previews.

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