Investment software almost universally focuses on individual assets (usually shares of stock). At best, portfolio management is added as an afterthought. This forces you into a myopic frame of mind where overall portfolio growth takes second seat to the performance of individual portfolio components. Some software authors will go so far as to recommend that you concentrate on and trade a single stock exclusively. That certainly makes their job easier, but it runs counter to all existing knowledge about successful investing and risk management.
In Investment Studio, portfolios are not an afterthought; they are the starting point. Conceptually, all your investments are part of a tree structure with portfolios at the root. Each portfolio contains assets; each asset contains transactions and is linked to a quote history. Investment Studio's user interface is organized in views which reflect this natural structure