The primary way to change to another view in SharePortals is by using the View dropdown while viewing the entity list.
For example, to change the view for the Accounts entity type, click on Accounts in the top menu on the SharePortals front page, which will take you to the Accounts entity list.
Now click on the View dropdown button (the magnifying glass icon at the top right of the entity list):
This will display a list of the current views, followed by view editing options. Click the view you want to switch to from the list to change to that view.