The 2D Scene Properties dialog is used to configure the various attributes of a 2D scene, such as background colour, grid settings, etc.
General Tab

Summary - Text description of the scene (optional).
Thumbnail - A thumbnail to be used to represent the scene. This can be one of the auto-generated location_... thumbnails, or any other image that you have added to the scene's resources.
Size Tab

Document Size - 2D documents have a native pixel size. This sets the size of the document in pixels
Document Scaling - If the owner document is of a different size to this scene, the document will either need to be scaled to fit or positioned within the owner.
Background Tab

Background Type - Select the type of background that you want to use for the scene.
none - the background is transparent.
solid - the background is a solid color. Click the 'Color' panel to change the background color.
image - the background is a bitmap. Click 'Browse' to select the file to use.
Grid Tab

The grid can be used to help easily align objects when they are moved or rotated.
Snap to grid - Enables the grid and makes objects snap to even amounts of the grid Spacing values.
Snap to edges - Objects 'stick' to the edges of other objects if they are within the Range .
Origin X, Y - The offset of the snap grid - defaults to 0,0.
Spacing X, Y - Object coordinates will snap to the nearest spacing value above or below their current position.
Edge Configuration Range - The distance away objects need be from each other before the snap to edge occurs.
Effects Tab
Effects can be added to a scene in the same way as they are added to objects


