After purchasing a smallcase, if you wish to increase your exposure, follow these steps:

Step 1: Go to your Investments page and select the smallcase you want to invest more in.

Step 2: Click on the "Invest More" button located on the right side.

Step 3: On the "Invest More" page, you can buy additional shares while maintaining the weighting scheme. The system suggests a minimum amount to keep the weights, but you can adjust it to invest any desired amount, which will be rounded to the nearest amount required for weight maintenance.

You can use this functionality to double down on your investments anytime you like. You can also invest more through SIP.