You can use the vector merge command to merge vectors into either an existing or new raster image. Vector merge allows you to make precise changes to your raster image using AutoCAD vectors, while keeping your data in a raster format.
When you merge vectors, you can select raster pen widths for the merge by specifying pen thickness in the Raster Pen Settings dialog box.
Raster pens apply a specified line width to vector entities when you merge them into the image. Line widths are assigned according to entity color.