Once you've created your own Portfolio - by following the steps in How do I create a new portfolio? - you'll be able to add transactions to that portfolio.
To add a transaction;
- go to https://www.dividendmax.com/portfolios
- select your portfolio from the menu by clicking on the portfolio box at the top
- select the Transactions tab - or go to https://www.dividendmax.com/portfolios#transactions
- click the Add Transaction button and select the Transaction Type
- populate the required fields
- select the blue Add Transaction button at the bottom