1. Are printers per visible per tenant or per company? Per company, unless you use the same printNode API key in multiple companies.

2. Is there a limit on the size of documents that can be printed?  Yes there is, the request body may not be larger than 50MB.  If you attempt to POST a request that is larger than 50MB, you will receive HTTP 413 Request Body Too Large.  You can work around this size limit by using pdf_uri printing." - API Reference | PrintNode