The CLEO menu (or simply "menu") is used to manage scripts, cheats, and CLEO's own options. You can access it by swiping down on the screen. The menu is available everywhere in the GTA app, but if you're not in the game, you can only access the CLEO options from within it.
The Options tab contains several settings. Some change the behavior of the game, others change the behavior of CLEO. Enabled options are highlighted in green and set to On. on the right side of the screen. Disabled options have white text and display the word "Off" instead. Each setting has a description that includes the default value for that setting.