There is how to duplicate a guide on Acrobat Reader?
I can´t open de same pdf twice. This would help me a lot, so I can read the normal text, and leave opened on references, or annex on the side guide for fast checks.
Sorry for bad English. I'm brazilian
Save as>Rename file>Open old file.
I will have two files, with diferent names?
If you "save as" to a different name, yes. You will have the new file with the new name and the old file with the old name.
Could have a form of to do, without two same documents
You can use the menu Window > New