If I have a long list of expense items that takes a long time to scroll through while entering expenses, how can I limit this list in Core?
Core allows you to assign items to projects as a control measure, which can limit your drop-down lists in the expense entry screen. The Project Assignments screen allows you to specify which employees can work on which projects and what expenses are allowed for them. So, when you go to your Expense Entries screen, you only see those projects and items that are assigned to you.
To set up project assignments, check Assign Expenses to Projects for details.