diff --git a/HDF5_Thumbnails.md b/HDF5_Thumbnails.md
index 6a54a29..459d09a 100644
--- a/HDF5_Thumbnails.md
+++ b/HDF5_Thumbnails.md
@@ -1,6 +1,8 @@
 # Overview
 
-Most people are familiar with thumbnail images for JPEG images that are presented by a file browser. The same system can be used for HDF5 files to help users sort and locate their data files. HDF5 files
+Most people are familiar with thumbnail images for JPEG images that are presented by a file browser. The same system can be used for HDF5 files to help users sort and locate their data files. HDF5 files can contain some header space (called a "user block" by the HDF Group) that can contain information that is not part of the dataspace managed by the HDF5 libraries. The [Extensible Metadata Platform](https://en.wikipedia.org/wiki/Extensible_Metadata_Platform) is a standardised XML-based system for inserting metadata into files. A script can be used by Pixelator to insert XMP metadata into the HDF5 data files, which can then be viewed in a standard file browser after installing the custom thumbnailer.
+
+Further information can be found in this [presentation from the 2019 HDF5 European Workshop](https://www.hdfgroup.org/wp-content/uploads/2019/09/Watts_XMP.pdf).
 
 
 # Pixelator
@@ -15,4 +17,11 @@ python3 ../../PixelatorController/config/PolLux/scripts/insertXMP.py $filename
 3. Edit your `settings.json` file (that is given as an argument to the Pixelator binary call) to ensure that the `endOfScanScript` parameter points to the script file above.
  
 
-# File Browser
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+# File Browser
+
+A custom thumbnailer is implemented by the [HDF5XMP](https://github.com/nexusformat/hdf5xmp) project, which can be installed on a computer to enable the native file browsers to access the XMP thumbnails embedded in the HDF5 files.
+1. Download the [released precompiled thumbnailer binaries](https://github.com/nexusformat/hdf5xmp/releases) (expand the "assets") for your OS type.
+2. Decompress the archive.
+3. Follow the instructions in the `README.txt`.
+4. (may need to restart the system)
+5. Open a file browser and view some HDF5 files that have thumbnails embedded in them.
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