When working with large, complex PDFs it's best practice to rasterize the image. This will improve overall system performance while working within the project.
- Select the image, then select the Scale tool in the Image section of the Blueprint tab of the ribbon bar.
- In the Scale Graphics dialog that opens, check the option for "convert PDF to rasterized image." You may optionally enable "automatically reduce pixel size." This will increase performance at the cost of slightly reduced image clarity. "Keep aspect ratio" should remain checked.
- Click OK when finished.