To access the Task List screen, see:

Info - Tasks List (Desktop).

For more information on Tasks, see: Intro - Tasks - This article contains all the 'How To' Task articles. 

Once you open a Task, all the Task details will be displayed on the screen : Info - Task Details.

The Task Kebab menu can be accessed at the top right of the task details, for more information on the actions that can be performed from the task menu see, Info - The Task Kebab Menu (Desktop).

For information on the Task Breadcrumb menu, see: Info - The Task Breadcrumb Menu (Desktop).