GoodTask has 2 main areas. One is 'Lists' which shows Smart Lists and Reminders Lists. Other is 'Tasks' which shows tasks in one certain list.
Swiping on 'Tasks'
On 'Tasks' area, you can switch between 4 types of views. List, Day, Week and Month views. When you swipe on 'Date area' on top of tasks, you'll move to previous/next dates on Day/Week/Month views. When you swipe tasks, you'll go into Quick Actions/ Subtasks view directly.
Long tap to move data (Drag and drop)
On both 'Lists' and 'Tasks', you can long tap an item to move it up and down. On 'Lists', if you want a separator, you need to add a new list. Newly added list will be made with a separator so you can use it to manage your lists. On 'Tasks', when you move your tasks, it'll dynamically change according to your 'Sort Options'. You can drag and drop multiple tasks into lists.
GoodTask for iOS 3.6 Update (Smart Button, Drag and drop & more)
GoodTask for macOS 3.6.1 Update (Better drag and drop)
If you tap '...' button on top right, you'll get additional options. You can choose 'Bulk Actions' to edit/complete/delete multiple tasks at once. Also you can change 'Sort Options' and share or edit the list.
You can tap search button to search all tasks. Results will come up as you type. If you choose a task, list will change accordingly to show the task.
macOS version is divided into 3 areas. Lists are shown on left pane. Tasks are shown on mid pane. Details of task are shown on right pane. Left/right pane can be hidden with top left buttons or CMD-L/CMD-D.
By default Subtasks (CMD-/) and Quick Actions (CMD-K) have separate panels. You can check ' > View > Integrate Panels' option and it'll be added to the bottom of right pane. By dragging the line above quick actions/subtasks icons, you can adjust height of bottom area.