In market data, the NAV for different funds can be added. Either manually or by CSV import.
Go to Market Data, choose Fund rates.
Use the '+' sign to add a new date in the name column
Then use the '+' sign above NAV to enter values for the different Funds.
They should be defined in How to set up a Fund
To import via csv file, use
the file needs to include Date, ISIN and price. Note that the price needs to have point as a decimal separator.
Se example file