Where is the app switcher button located on a Blu Vivo Air?

I recently received a Blu Vivo Air phone running Android 4.4.2. I'm finding that some of the things well-described for Android are disabled or missing from this phone. For example:
- Under Security, options for encrypting storage and setting the device owner are missing
- The button to the right of Home, which is traditionally the app switcher (with an icon of two rectangles), is instead a "<" character that seems to bring me back to the previous app. I can't find the app switcher. (Long press of Home brings up Google Now.)

I have an Acer Iconia Tab with 4.4.2 and it has all the options I expect.

It does have Developer Options enabled, but turning that off makes no difference. I've done multiple Google searches trying to find this info but everything I find seems to assume that its like the Acer tablet. Thanks.

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