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i've been assigned a task of writing some pages in a offline software but that software is unable to copy and paste
How? What software did you use for this?
I used onlineocr for it. Im sure it doesn't but is there a way around it?
if their software has disabled it, is there any way we can still somehow activate paste function?
Create a powershell, python or AHK script which can type it out for you.
We can't help you unless you explain what you are using and why do you want to copy-paste in it instead of typing yourself.
Google is your friend. If I have to explain it to you, don't you think you are better off just typing the words directly?
Well you never asked before. I would have, had you explained you needed more information.