Canopy UL 1.0 is an Excel format designed to allow you a perform a wide variety of functions in bulk. These include entering Transactions, creating Accounts or Securities, entering Prices etc.
A good primer is here on our public Confluence page
Canopy UL 1.0 Upload screen in Engine
Canopy UL 1.0 templates can be downloaded from Engine (see screenshot above), but are also enclosed here for convenience.