Once you have bought your smallcase, and want to increase your exposure to it - you can invest more in your smallcase
From your Investments page, click on any smallcase and you will have the option to Invest More in its right.
The Invest More page helps you buy more of what you currently hold, meaning it will have a minimum amount to maintain the weighting scheme. You can increase this amount to invest whatever amount you like, and it will be adjusted to the closest amount required to maintain the weights
You can use this functionality to double down on your investments anytime you like. You can also invest more through SIP
If you are placing the orders after market hours, the orders will execute in the next market day within the pre market hours: 09:00 AM to 09:14 AM.
When you place the Invest more order during the Non Market hours, you will get the below message before confirming the order. And the order will be in pending status until it gets executed.
You will also have the option to cancel the order before execution from the Orders page > Select the recent Invest more order > 'Cancel this order' > Cancel order.
Note: Please maintain a surplus cash of some additional amount in your Zerodha funds. This is to ensure you have enough funds to purchase all the stocks instantly in case if the stocks price hiked up.
smallcase is about helping you manage your portfolios seamlessly. You can also add certain stocks or shares to your smallcase
For more on how to do this, you can see here
Caution: Adding stocks or shares from your smallcase means it will not match the original version, and hence the holdings, composition & returns of your smallcase will be different. Only proceed with managing your smallcase, if you know what you're doing. Not recommended for first-timers :)