Occasionally, you may find that drawings do not appear the same in the app as they do on the website, such as color markings that are not visible.

The way to resolve this is to open the PDF in Adobe's PDF reader and print the file from there.

Select the printer named Microsoft Print to PDF, which allows you to save the file again on your computer.

This method ensures that all elements in the file are combined into a single file, which the app can then load as usual.