Most people will start using O4 through the GUI. Any user can activate what we call the "O4 Dashboard" (what will become the OASIS O4 home). To do this, select "HOME" in OASIS:
Then select "Preferences" under the "File" menu. In the dialog that shows, select "Display":
Check the box in the bottom right corner that says "Show O4". Re-login to OASIS and you will see the "O4 Dashboard" icon. Clicking on the icon will show the O4 environment.