You can insert individual wires into the phatIO’s socket or plug into a breadboard so all pins are connected to board sockets.
I’m currently in the process of developing a connector to directly connect phatIO (with a 0.1“ pin spacing) to a breadboard (with 0.3” between the rows). In the meantime, here are two simple but effective solutions.
Be careful not to use excessive sideways force when connecting phatIO to a breadboard or the solder joint to the PCB may break.
To create a fairly solid connector a piece of Vero board and .1" header can be used:
A piece of bent long legged right angled header can be used to connect one side of phatIO to shift the 0.1“ spacing to 0.3”.
Your phatIO device came with a sticker that can be used to mark the pins and functionality, useful on a breadboard. The sticker needs to be cut to size (the cutting accuracy of the manufacturer couldn’t be guaranteed in time for shipping). Just cut out the coloured sticker from the white background.
The smaller pin ID sticker should fit snuggly on the connector side and the larger one on the board side, both with pin numbers next the the edge.
I will be create a Fritzing part for phatIO as soon as possible.