The Layer Options define the way that data is rendered on the map, including things like the symbols, coloring and transparency, as well as projection and unit interpretation of the data and scale at which to display the data.
Highlight a layer in the Control Center and press the Layer Options button to access the available display options for the selected layer(s). This is also available by double clicking a layer name or right clicking and choosing Options.... .
Options can be set on multiple raster, vector or elevation layers at the same time. Select a layer group and then choose options, or highlight multiple layers in the Control Center using the SHIFT key to set the options for multiple layers at the same time. The available display options tabs shown in the Layer Options dialog depends on the data type of the selected layers. The following display options are available: