Hi, I save the documents (invoices) to s3 with base64 and for example I want to cancel that invoice and when I cancel I want to duplicate that document and after that all values inside document to be negative with - before. I'm really stuck with it I don't know where to start
Welcome to the forum! What type of document is it?
is PDF document
OK well I have never done what you described so unfortunately I cannot provide help. I know that if you search the forum you may be able to find some more information. (i.e. - PDF Monkey)
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Hi @pekinese I haven't done something like this before, but it might be something you can accomplish with an external library in Retool 
This topic has some info about working with pdf libraries in Retool.
I haven't used this library, but I see it offers support for modifying pdfs