Instructions
Load the Digimon World Dawn game and press "Farm PC." This will open a new menu with several choices to click on.
Click on "Digimon List" from the Farm PC list. This will open a list of all Digimons in your inventory. Some may be the three Digimons you started with automatically; others may be ones you acquired through the game or ones you custom made yourself.
Scroll through your Digimon list until you find the one that you wish to add to your party.
Click on the desired Digimon. A pop-up will appear with several choices about what to do with that item.
Select "Move."
Press the letter "R" to return to your party. If your Digimon does not appear, it's because your party is full, and you must select a Digimon to leave the party so that it can be replaced with the new one.
Select the Digimon you would like to be replaced. A menu will pop up. Select "Digibank" to send it back to your Digimon List.