The built-in pdf reader cannot be saved
The built-in pdf reader is just a closed software, especially when I use it without Zotero. When facing some scan files pdf, the words cannot be marked because they are not selected. Please ask the development team to consider adding the function of saving and drawing shapes to the pdf reader.
The reader has an image annotation feature, but it's really intended for figures and other graphical features. I don't know what you mean by that, but if this is a separate topic, please start a new thread for this and say more about what you mean.
2.I noticed that some files are difficult to recognize by ocr, so I need to draw graphics to emphasize them, such as lines, rectangles, etc.