I have an exam paper scanned and saved as a PDF and I'm supposed to check it (correcting and giving marks). However, I lost the original hardcopy of this exam paper and I only have the scanned version in PDF. I cannot print this PDF as well since the area where I live is sealed due to covid-19.
The only solution I could think of is as follows:
putting tick marks, grades, and numbers in my own handwriting on a blank paper then scanning it.
Opening the PDF in Photoshop and place the tick marks and grades on the exam paper.
Exporting the file as PDF and emailing it to my boss.
But for some reason Photoshop only allows you to work on a single PDF page at a time and then saving it individually, and this would make my task take ages.
Could I open and edit all the pages in the PDF simultaneously and then save them all into one PDF file again?