Tackle makes team management super easy. You can create groups with specific calendars and use them to track your team's time. Here's how to add multiple calendars to a specific group:

Step 1: Open the Tackle app and go to the "Data source" section on the left sidebar.

Step 2: Switch to the "Manage groups" view from the "Manage data source" view.

Step 3: Click on the "+Create new group" button.

Step 4: Give the group a name and select the calendars you want to include.

Step 5: Finally, click on "Create Group", and your new group is ready to use..

That's it! Now you can use this group to track your team's time with ease.