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Changing Thumbnail Images

When you add items to a project, CONTENTdm generates scaled-down versions, or thumbnails, of the images or files for use within the project and within search results. Thumbnails are generated automatically for JPEG, GIF, TIFF, JPEG2000, PDF. However, with some types of items, such as music, oral histories, or documents, when the Project Client cannot generate a thumbnail for a specific file type it may be more useful to have thumbnail images that represent all oral histories or all documents within a collection.

Learn about:

  1. Adding a Thumbnail to the Thumbnail Manager
  2. Editing Extensions in the Thumbnail Manager
  3. Deleting a Thumbnail from the Thumbnail Manager

Using the Thumbnail Manager, you can create and edit associations between thumbnail images and one or more file types, or add your own representational images to the Thumbnail Manager. This way, if you have automatic thumbnail generation turned off, then whenever you add a specified file type to a project, a predefined thumbnail image is generated for that file type. (For more information, see Using Custom Thumbnails.)

The preset thumbnail images and file extensions within the Thumbnail Manager may be edited, updated or deleted with the exception of the Default thumbnail image, which can be edited but not deleted. The Thumbnail Manager provides preset thumbnail images for the following file types:

Video avi, flv, mov, mp4, mpg, qt
Audio wma, mp3, wav
PDF pdf
URL URL, null items
Microsoft Word doc, docx
Microsoft Excel xls, xlsx
Microsoft PowerPoint ppt, pptx
Zipped File zip
Digital File
Default, any undefined file extension

Adding a Thumbnail to the Thumbnail Manager

Images added to the Thumbnail Manager must be saved in JPEG format and may not be larger than 160 pixels wide or 120 pixels high.

Changes made within the Thumbnail Manager apply to the current project. To replicate these changes in other projects you must repeat the steps while working in those projects.

To add a thumbnail image to the Thumbnail Manager:

  1. From the Home tab or the Project tab, click Edit Project Settings. The Project Settings Manager displays.

  2. Click the Images & Thumbnails tab. The Images & Thumbnails page displays.

  3. Click Thumbnails. The Thumbnail Manager displays.

  4. Click Add. The Add Thumbnail Mapping dialog box displays.

  5. In the Media Type text box, enter information about the types of media this thumbnail will be associated with. This information will not appear on your image.

  6. In the Extensions text box, type the file extensions that you wish to associate with the image. Separate multiple file extensions with a comma. For example: wav, mp3, wmf. The same file extensions may not be used twice within the Thumbnail Manager.

  7. Click Choose Thumbnail. The Open File dialog box displays.

  8. Select the thumbnail you want to add and click Open. The new thumbnail image appears in the Add Thumbnail Mapping dialog box.

  9. Click OK. Then, click OK to close the Thumbnail Manager.

Now, when you add the specified file types to the project, the new thumbnail image will be used as a thumbnail representation for that file type if the Project Client cannot generate one automatically (or if you have turned off the automatic thumbnail creation option in the Project Settings Manager). These changes will apply only to the current project.

Editing Extensions in the Thumbnail Manager

With the Thumbnail Manager, you can replace the thumbnail images for specified file types and add or edit file extensions associated with thumbnails.

To edit file extensions associated with thumbnail images:

  1. From the Project menu in the Project Client, select Project Settings Manager and then select Images & Thumbnails. The Images & Thumbnails page displays.

  2. Click Thumbnails to display the Thumbnail Manager.

  3. Select the row of the thumbnail you want to edit. Click Edit. The Edit Thumbnail Mapping dialog box opens.

  4. Make changes directly in the Media Type or Extensions text boxes or replace the existing image by clicking Choose Thumbnail.

  5. Click OK to save your changes. Then click OK to close the Thumbnail Manager. These changes will be applied to all subsequent additions to the current project.

Deleting a Thumbnail from the Thumbnail Manager

  1. From the Project menu in the Project Client, select Project Settings Manager and then select Images & Thumbnails. The Images & Thumbnails page displays.

  2. Click Thumbnails to display the Thumbnail Manager.

  3. Highlight the thumbnail image you want to delete.

  4. Click Delete. The thumbnail is deleted from the project.

  5. Click OK to close the Thumbnail Manager.