Methods for communicating support of operations or capabilities for enhanced directional multi-gigabit (EDMG) communications are described. A supported channel width field or operating channel width field is used in a capabilities element or operation element. The supported channel width field or operating channel width field includes bit positions with bit values that are set to indicate support of operation or a capability of the transmit device from among defined options, the defined options including: the transmit device can perform channel bonding only, the transmit device can perform carrier aggregation only, and the transmit device can perform both channel bonding and carrier aggregation.