A column is also known as a layer. There are several types of layers that you can add in the Xsheet view. Each layer is tagged with an icon to help differentiate them. Some layers are represented differently in the Xsheet view.
The most common layer type is the drawing layer. Any time you need to create a vector drawing or import a symbol or image, you can use a drawing layer. You can also create bitmap artwork on a drawing layer.
A Peg layer is a trajectory or motion path layer that does not contain drawings. It can be attached to any drawing layer, cut-out puppet, or other peg layers; they will all follow the trajectory you set in the Peg layer.
In the Xsheet view, the Sound layer is a dark grey colour.
In the Xsheet view, you can add several advanced column types to create particular animation paths. When you create these columns, they are not linked automatically to any particular drawing layer. You can create a motion path using these columns and then link or unlink several drawing or peg layers to it.
Advanced column types include: