On the 'Edit task resource' screen you can change the setting for a grid resource used by the task. In case of the DNA Assembly job tasks the only resource that can be requested is the host on which a particular task is executed. It is best to use the same host for the whole job to avoid unnecessary data transfers between the job tasks. To change the setting choose a new host from the 'Resource value' dropdown menu. To confirm your selection click the 'Save' button. Clicking the 'Reset' button will undo the changes.