The Matrix view shows the assignment of the team resources to the projects. Here, you can make a rough planning by assigning resources to projects before going into detail in the Plan view.

Red background: assignment with commitment values in the team plan
Black background: assignment without commitment values in the team plan

Assignments can be established by selecting the appropriate checkbox(es). Removing the checkmarks deletes the assignments.  

➤ When you delete an assignment marked in red, the commitment values of the respective project in the team plan will also be deleted. Therefore, a confirmation / warning prompt is displayed: You are removing an assignment with time-phased data or custom field values! Would you like to continue?
When you delete an assignment marked in black, there is no confirmation / warning prompt.

Request and commitment values saved in CoRePlanner will be reloaded when you click the Projects button in the Import group of the menu bar.