Free locked reserved

Retro Graphics Toolkit’s palette editor has an option for each color to make it one of three options

• Free
• Locked
• Reserved

When a color is set as free that means the color can be modified and used by tiles.

When a color is locked that means that it cannot be modified, but it can still be used by tiles. This includes any function within Retro Graphics Toolkit. For example, clicking on generate optional palette with x amount of colors and using that with a palette that contains a locked color will result in the color remaining constant.

When a color is reserved it cannot be used or modified. With one exception: It can be used as a transparency color but it cannot be used for solid colors. An example of where this feature would be used is in Sonic One sprite editing. Sonic one’s sprites, which have black as the transparency color and black as a solid color. This will allow black to be both the transparency color and allow you to have black pixels which are not transparent.