How to export displacement results (deformed shape) in CSV/TXT from nodes in Named Selection

Besides using the APDL commands, one possible way would be to add Python Code in Solution branch:

def after_solve(this, analysis):
    # Do not edit this line
    import mech_dpf
    import Ans.DataProcessing as dpf
    import os
    mech_dpf.setExtAPI(ExtAPI)
 
    dataSource = dpf.DataSources(analysis.ResultFileName)
 
    ScopingOp = dpf.operators.scoping.on_named_selection()
    ScopingOp.inputs.named_selection_name.Connect("MyNodeSelection".upper())
    ScopingOp.inputs.data_sources.Connect(dataSource)
    MeshScoping = ScopingOp.outputs.mesh_scoping.GetData()
 
    # Get displacements for the scoped nodes
    displacements = dpf.operators.result.displacement()
    displacements.inputs.data_sources.Connect(dataSource)
    displacements.inputs.mesh_scoping.Connect(MeshScoping)
    disp = displacements.outputs.fields_container.GetData()[0]
 
    # Get Mesh information to retrieve node coordinates
    meshData = ExtAPI.DataModel.Project.Model.Analyses[0].MeshData
    nodeIds = disp.ScopingIds  # Get node list from results
 
    # Create a list to store node data
    node_data = []
 
    # Loop over nodes and collect data
    for nid in nodeIds:
        node = meshData.NodeById(nid)  # Node data for nid
        nodeDisp = disp.GetEntityDataById(nid)  # displacement from node nid
        node_data.append((nid, node.X, node.Y, node.Z, nodeDisp[0], nodeDisp[1], nodeDisp[2], node.X+nodeDisp[0], node.Y+nodeDisp[1], node.Z+nodeDisp[2]))
 
    # Sort the node data by ascending X coordinate
    node_data.sort(key=lambda x: x[1])
 
    # Write sorted data to txt file in user_files directory from project
    outFileName = os.path.join(analysis.WorkingDir, 'exported_disp.txt')
 
    with open(outFileName, 'w') as f_out:
        f_out.write('# Node \t X\tY\tZ\tUX\tUY\tUZ\tdefX\tdefY\tdefZ\n')
        for data in node_data:
            f_out.write('\t'.join(map(str, data)) + '\n')
 
    pass