There are 3 parts to understanding this:
You invest in a smallcase by using funds in your Broker account. You can either start an SIP or do a lump-sum investment. All invested smallcase constituents will be added to your Demat account.
You can track your invested smallcase's performance, and dividends and evaluate your portfolio under Investments. You can see details of every stock so you know where your money is at all times.
You have complete control over your investment. You can add, edit or remove any stock from your smallcase anytime. You can also see & review rebalance updates, edit your SIP, etc., from your Investments.
💡 Good to know: There are no lock-in periods in smallcases. Like stocks, you can sell them whenever you want. We only support stocks/ETFs listed on NSE.