In version 1.5 or newer

The creation of page thumbnails is automatic. See Configuring page thumbnails in 1.5 or newer.

In version 1.4 or previous

You can change the resolution of page thumbnails, by editing or adding the value in EditorialConfig.

To access the EditorialConfig, run EdAdmin4, in the Application Configuration section, click Client applications, search for EditorialConfig and then double-click it.

Edit the numerical part of the value in:

<Item Name="previewmode" Value="s400" />

This is the parameter of the PagePreview method. The numeric value is expressed in pixels.

If you cannot find the line, add it under the <Dict> node, in the above format.

For further details about values, see PagePreview Method.