I just got an ATSAMD21 Xplained pro board. The schematics included in the software for the board are SCHDOC files, and I don't have Altium. I've looked all over for pdf, or any other usable format for the schematics for this board, but haven't found anything usable.
Could anyone point me to some pdf schematics for this board, or suggest an alternative. The Altium "viewer" is unusable...