How to Reinvest via Deposit

I have a pie with a handful of Vanguard, iShares indexes. They pay dividends into the pie, which obviously sit under Dividend Income in ā€˜Total Gainedā€™.

How can I use this when I tap ā€˜Investā€™ and invest money into the pie?

I can obviously use ā€˜+ pieā€™s cashā€™. But this is cash, not the dividends sitting in ā€˜Total Gainedā€™.

Thanks for any help!

Total Gained is just a tot of all dividends paid into the pie. If youā€™ve been reinvesting dividends before it wonā€™t subtract from Total Gained. Think of it as a running total of pie income, not income that is yet to be reinvested.