If you are using Raster Design (ARD), take a few minutes and explore the ARD Options dialog (command name IOPTIONS).
We frequently edit raster images using Raster Design (ARD) by merging vector linework back into the raster image. In almost every case, we wish to discard the vector entities after performing the merge.
One of the options you can control is whether ARD prompts you each time to discard the vector entities. Look on the Vector Merge tab of the IOPTIONS dialog.
There are many other options in the IOPTIONS dialog that are worth exploring if you have not already.
