These lists usually include the current Zone's Badniks, certain platforms, and other obstacles or scenery. Pressing will cycle through placeable objects, and while holding, pressing the button will cycle backwards through the list of objects. In Mega Drive and Sega CD games, the player may press to activate and deactivate object placement mode, which replaces the player character with an item that can be freely moved around the stage with and placed by pressing. Generally, the HUD changes to show the player's coordinates in place of the score counter.
Sonic the Hedgehog, Sonic the Hedgehog 2, Sonic the Hedgehog CD, Sonic the Hedgehog 3 & Knuckles, and Sonic Mania each have a Debug Mode that activates the same basic set of features.
