By default, your hand is sorted automatically to create melds. If you would like to sort your hand manually, look for the “Auto Sorting” option in the Settings. This option can be set to either sort “None,” “Melds,” and “Melds & Jokers.”
When set to “None” you will need to drag cards together to create new melds yourself
The setting is set to “Melds & Jokers” by default, where everything is sorted for you
When set to “Melds” the game will automatically create melds, but not use jokers to do so. You can drag the jokers yourself to create melds freely.