In pixels, enter the maximum width for preview images displayed in multi-document view before CSS scaling is applied. Due to CSS scaling, preview images displayed in multi-document view are scaled to fit the height of the Document Viewer.
Valid values range from 100 through 1000. This value must be at least twice as large as the value for ThumbnailHitListThumbnailMaxWidth. The default value is 1000.
Note:
While larger values may improve image quality in multi-document view, they also may increase the load time for preview images.