I'm recently switched to AutoCAD LT 2015 for Mac (from an older PC version) and I can't locate the view cube anywhere. Per the product info, I should be able to go to"view," "display," "viewcube" but it just doesn't exist in my drop down menu (see attached image).  Nor can I conjur it through commands "navvcube" or "viewcube"...it responds "unknown command."  Any thoughts why it might be missing, and/or how I can get to appear?  I use it frequently, would love to have it....