How do I allocate more RAM to Geneious Prime?

In Geneious, go into Tools→Preferences, and under the General tab increase the “Max memory available to Geneious”.  You may need to restart for the change to take effect. On Window Vista, Windows 7, 8 and 10 you need to run Geneious as an administrator to change this setting (close Geneious, then right-click on the Geneious icon and choose “Run as administrator”).  

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