To easily edit your autocad drawing convert it to svg (vector file)
and use svg-editor its a free software that open in chrome
since Autocad compose of thousand of tag most probably you will have a hard time to edit the style and put alarm or blink some part of the drawing.
One technique is to add layer on your SVG drawing and draw on top of the original layer with transparent color of a pen following part you want to changed the style.
When you imbedded the image in ignition you will see
3 elements that will be your layer.
the second layer that's will be you drawing and that where you will changed and apply style on tag element instead of search on thousands of element of Autocad drawing, now you will just search on the layer you created.
