To Define On-Demand Simplified Representations Settings
1. In an open assembly, click > 
Options. The Creo Parametric Options dialog box opens.
Options. The Creo Parametric Options dialog box opens.2. Click Assembly.
3. In the Component retrieval settings area click On Demand Settings. The On-Demand Settings dialog box opens.
4. Set a mode of operation for on-demand retrieval:
◦ Prompt—A confirmation is required before each retrieval of on-demand simplified representations. You are not prompted for the retrieval of components in Automatic representation.
◦ Never prompt (default)—Models are retrieved without confirmation.
◦ Disable—On-Demand retrieval is disabled. On-Demand retrieval is not disabled for the retrieval of components in Automatic representation.
5. To retrieve the original model of any backed-up references, click the Retrieve referenced models for backed up references check box. Upon retrieval, the backed-up references are updated to reflect changes in the original models.
6. Select a task from the task list to define its setting in On-Demand mode:
◦ Activation—Click the On-demand activation check box to retrieve the Master Representation for activating a component.
◦ Regeneration—Click the On-demand regeneration check box to retrieve simplified parent components in a higher representation level upon model regeneration. Select Automatic for automatic selection of the representation type to retrieve, or select Master to retrieve all simplified representations in their Master representation.
◦ Selection—Click the On-demand selection check box to retrieve simplified components in a higher representation level for selecting internal items. Select Automatic or Master.
◦ Editing—Click the On-demand editing check box to retrieve simplified components and their parents in a higher representation level for editing purposes. Select Automatic, Master, or Master with ancestors (parents of parents).
◦ Cleanup—Click the On-demand cleanup check box to remove unmodified simplified representations retrieved on-demand. Select Restore representation to remove on-demand representations, or select Restore representation and erase to remove and erase from memory components retrieved on-demand.
7. Click OK.