If your layout file must feature multiple parts that have identical artworks combining text and raster images, you need to tell the EngView/Adobe Illustrator integration how you want it to (1) populate the layout file with these images and (2) render the text. You have two options, and they have their upsides and downsides.
This is the message that the integration displays, asking you about what you want it to do:
Illustrator can:
NOTE: You will not be facing this choice if your designs do not feature text; in that case, the output file size remains the sole factor you will have to consider.