You have a My Tasks section that gathers all the cards you've been assigned to, all projects included.
You can:
click on a card to access its content,
validate the card (it then disappears from the My tasks view),
return to the project by selecting the project name on the card.
You can organize these cards in different sections. These sections are customizable and personal.
To create a new section, simply select Add a section. You'll then be asked to fill in the name of the section.
Once the section is created, you can drag and drop the cards located in the All Tasks section into the section of your choice.
To go further
Keyword
My task, projects, section, add, delete