Boards: moving tasks to sub-tasks

I often find that when using a board I end up with tasks that should really be a sub-task of an existing task or I or occasionally have sub tasks that need to move to other tasks as projects develop. It would be really nice if within the board projects you had the same flexibility to move tasks in and out of each other as well from column to column

Hi, I coul’nt move a task into another task when in “board” mode.