If you want to add a second panel to an existing free-floating panel, which action would you perform?

• A. From the Window menu, select 'Show All Panels'.
• B. Drag the tab of another panel into the tab bar of the free-floating panel.
• C. Double-click the free-floating panel to merge panels.
• D. Close and reopen the panel group.

Answer: (B)

Panel grouping is done by dragging a panel’s tab onto the tab bar of another panel. This action merges them into one docked group, so the second panel becomes part of the free-floating panel’s workspace and you can switch between them by clicking their tabs. To do it, grab the tab of the panel you want to add and drag it toward the free-floating panel until the tab bar highlights, then release. The two panels now live in one group, and you can reorder the tabs as needed. The other options don’t perform this docking action.