Managing images and videos for thumbnails and preview

You can control the size of thumbnails for images and videos using the file-preview-config.xml.

The file-preview-config.xml file controls the size of thumbnails and supports the acceptable image and video types in grid view and preview dialog.

Start the wsadmin client as explained in Starting the wsadmin client.
Use the wsadmin LCConfigService.checkOutConfig command to check out the file-preview-config.xml.
Open the file-preview-config.xml in your preferred text editor.
Review the default size values for previews in the thumbnail grid, gallery view, and detail view in the <preview> section and change them if needed:
```
-<preview>
    <thumbnailView height="73" width="73"/>
    <galleryView height="132" width="200" textHeight="30"/>
    <detailView height="450" width="450"/>
</preview>
```
Note: The supported file formats are listed in this file and appear to be editable; however any changes to the formats specified here will be ignored and the standard set of formats will still be supported.
Be sure to save your changes.