You have several options to see all your tasks in a list.
Using the search menu
Click the magnifying glass at the top right of your day view or use the keyboard shortcut "shift + s" to open the search dialog.
Here you can see all your tasks and projects in a list and apply filters to it and sort the list.
Using a Smart List
You can also create a Smart List that creates one giant list of tasks:
Smart List in Master List
You can then view this Smart List in the Master List (open Sidebar, Smart List tab, select "All Tasks" Smart List).
Smart List in Custom Sidebar
If you are using the custom sidebar strategy you can also make a tab there to see all your tasks anytime.