Aspects of the disclosure provide an apparatus that includes processing circuitry and a method for video decoding. The processing circuitry decodes coding information of a block to be reconstructed from a coded video bitstream. The coding information indicates intra prediction information for the block. For the block coded with a directional mode, the processing circuitry determines the directional mode based on a nominal mode and an angular offset. The coding information indicates the nominal mode and the angular offset. The processing circuitry determines a non-separable transform for the block based on the nominal mode, and reconstructs the block based on the directional mode and the non-separable transform. In an example, the processing circuitry determines a transform set mode that is associated with the nominal mode, and the transform set mode indicates a set of one or more non-separable transforms that includes the non-separable transform.