The Maps/Missions is a menu that is a combination of a Map menu and a Missions menu. They are only used in Ratchet & Clank: Size Matters and Secret Agent Clank. It could be accessed in the Pause menu.
Ratchet & Clank: Size Matters
In the map section, you will see a picture with the name of the location and the planet (ex. Jowai Resort, Pokitaru) on the top. On the picture, there are two colors that can be seen in the map: Yellow and Gray. Picture parts of gray are the parts that did not explore yet but the parts of yellow explored so. The missions section is different from the previous games. It contains the name of the location and the planet, its picture, name of the mission and it's description. However, it is still different because even you complete the game, the description still appears.