Use Raster Snap On/Off to open or close the raster snap capability. A raster snap is the placement of an accepted data point at a specific location on the closest raster element of an image.

If on, the raster in the selected extent will be erased.

Lets you determine where to place the nodes.

• Line — Use to place the nodes at the center of the raster lines. or on the edges of the raster objects or lines (Outline).

• Outline — Use to place the nodes on the edges of the raster objects or lines.

Used to select the color mask . The drop-down list shows the existing mask that can be chosen.

Used to determine the maximum width of raster lines. All lines, or parts of lines, or any raster object wider than this value will not be considered as a raster line. This value is given in pixels. Use the Measure tool to measure the width of the larger lines you want to convert.