How to Read a Square Tarot Card Deck
Firstly, always choose whether the cards are facing you, or a partner.
The 'top' of the card is evident in the imagery, in that it is the top of the card when the card is upright. Use the 'top' of the card as the directional arrow.
Give the cards a directional 'theme' before reading. Is this:
A lunar spread?
A directional (North, South, East, West) spread?
An elemental (Earth, Air, Fire, Water) spread?