It is easy enough to create a raster or bitmap image to greyscale, but what if you want a vector image greyscale try using these steps.
1. From the Edit menu, select Find and Replace > Replace Objects
2. Select “Replace a color model or palette”
3. Leave all settings here as is, with the exception of “Replace with the color model” and select Greyscale from the dropdown (note: this page works on fills and…