You can use the Move Tracks Window to easily move tracks from one listed track group to another.
From Track Group
Select the track group you want to move tracks from. Select the tracks you wish to move to the other track group and click the right arrow. You can select multiple tracks while holding the CTRL key. You can also double-click tracks to move them to the other track group.
You can select the columns that are displayed in this grid by right clicking the Header and selecting Select columns...
Select the track group you want to move tracks to. Select the tracks you wish to move to the other track group and click the left arrow. You can select multiple tracks while holding the CTRL key. You can also double-click tracks to move them to the other track group.
You can select the columns that are displayed in this grid by right clicking the Header and selecting Select columns...