Screen Editor
The screen editor is the most important editor in Editroid. It is incorporated into the main Editroid window. In the screen editor you can move, modify, add, and remove the enemies, doors, and objects in the screens that the game's world is constructed from. Each level has its own set of screens.

Once you have selected a location on the map, the screen found there will be displayed in the screen editor. You can expand the window to show multiple screens. Select a window size under Special ToolsàGrid Size.

Remember, screens are heavily recycled, and editing one screen will cause changes in multiple places in the map. You can change which screen is associated with each map location by using the Previous Screen and Next Screen buttons (or the page up and page down keys). Notice that the index of the screen being edited is shown on the bottom.

Objects may be moved by dragging them with the mouse. (An alternative is to use the tab key to select the item you want to move, using Ctrl+Tab to switch between enemies and objects. You may then use the arrow keys to move the item.) The Palette button (or the "p" key) changes which palette the selected object is shown with. For enemies the difficulty of the enemy depends on the palette. When objects overlap, if the colors don't look how you intend try holding shift and clicking the palette button. Use the object type buttons () or the plus and minus keys to cycle through enemy or object types. You can also bring objects to the front or send them to the back (this can not be done with enemies).

The Object Management menu provides options to add and delete objects and enemies, as well as add/change doors. Initially there is no free memory to add new objects, but as you delete objects from screens you will see the amount of free memory () increase. Free memory is not shared between levels.