- Install the latest version of the Java Runtime Environment (JRE or JDK).
- Download dm3270.jar from the releases page.
- Double-click the jar file, or enter 'java -jar dm3270.jar' in the terminal.
Select a server from the drop-down list and click OK. If there are no servers listed yet, click the edit button.
Runs anywhere. See the commands page for differences between platforms.