All decompiled .ysc game scripts as of GTA V build 2628 (GTA Online 1.60), including native tables. Note that this is a git repository, so there is a history, if you want to look at older scripts.

Inspector: You can read and edit in the inspector for the layers, such as the name, position, bounds, color, and more. Canvas: You can see supported layers and a preview of what they would look like ...