In the "Investments" section, you need to scroll down to the "Your investment packages" block.
Then, mark the deposits that you want to merge and click on the "Merge deposits" button.
Please note that the start date of the deposit will be on the day of consolidation and profit from unfinished trading months is transferred to the available balance.

3 mergers are possible per month - 30 days from the moment (and time) from the first merger.