Here is the list of 2D panels, taken from the ‘757 Captain III’ Manual Part I – Introduction (CS757CAPTAINIII_MANUAL_PART1.pdf page 20).

For better usability the following 2D panels are included:

Simicons (Shift+2)
Animations Control (Shift+3)
Radio Stack (Shift+8)
CDU (Shift+6, Shift+7 or click the CDU screen in VC)
MCP (Shift+4)
EFIS (Shift+5)
Displays' clones

Note. They are the same for FSX, FSX:SE, P3Dv3, and P3Dv4.