## Display Device Driver Reference for OS/2

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### Configuring the Device Context and Presentation Space

DTT enables you to specify the device context, presentation-space type, and presentation-space units to use when executing test cases. These parameters can be changed during manual testing or through script commands during automated testing.

To change the configuration manually, select Configuration from the Options pull-down menu or use Alt+C. See Operating DTT Automatically for information about changing the configuration using script commands.