This window can be accessed from the top bar: RetroJRPG→Level Design Tool
The template includes a tool that allows the simple instantiation of different gameplay elements such as: Doors, Cameras, Interactables,….

By default, the tool has selected default palette included with the template. Most of the important prefabs described in this documentation can be instantiated by using this palette.
Additionally, you can create your own palettes with game-specific prefabs.
You can create a new palette by right clicking on your Project View and selecting Create→RetroJRPG→Design→Prefab Palette
This palette will show up automatically for selection on the dropdown of the tool if ShowInTool is checked. If the palette doesn’t show up try closing and opening the tool again.

You can add additional Subpalettes to an existing palette to organise the content into categories.
The objects instantiated from the tool, will be created on the layers specified on the prefab entry

These layers allow designers to organize the instantiated content automatically.
You can create a new design layer by right clicking on your Project View and selecting Create→RetroJRPG→Design→Layer
Give the layer a name which will be used for the GameObject to where all the assosiated prefabs will be attached to.