Hello! I'm super excited to announce a new feature on fr.app: Layers!
Much like the layers that you may be used to from almost any drawing program, these allow you separate out parts of your track to draw, erase, move, and do anything else to without interfering with the rest of your track. This revision also adds a new type of track code that allows for layer settings to be kept when exporting and importing tracks - although you can still get a version that's compatible with the base game using the 'Flatten' button in the export menu. Finally, the layers also support different colors! This is not their main intent, but I'm sure some people will be able to make really cool tracks with this feature.
The main features can be accessed from a menu in the bottom right corner, next to the object menu:

From this menu, you can change the current layer you're working on, change settings for the current name (including changing its name, changing line colors, and hiding it), add new layers, merge the current layer into another layer, and delete the current layer. Every track starts with a base layer (called 'Default') that can't be deleted, but can be renamed / recolored as you please.
The update also adds more options to the eraser and select tools:

These options allow you to chose which layers the current tool is working on, between the current layer, all visible layers, and all layers in the track. You can hover over each of these buttons to get a reminder of what they do.
Finally, this update adds a button to the settings in the bottom left of the select tool that lets you move the current selection to a layer.
Thank you very much to @mbcool for making all of the icons used in this update!
As always, we would love to hear your feedback and suggestions on what to add! I'm sure that layers will keep changing rapidly in the coming months as I get Ness to do all of the hard coding work for me, so this is the perfect time to get a say in how the final feature turns out. Thank you as always for using the 1.1 track editor, and happy drawing!
*note: layers are currently in a beta state, and may have undesired effects on tracks like autos that require specific physics interactions. please make sure to save often / create plenty of backups for any track you're creating, with or without layers.
i'm so happy for you