I set parameters and design point for modal analysis in ansys workbench, l only can see first design point in model. Is there any way to show and update other design points in model?
As far as I understood from your question, you are looking for finding a way to plot all the modes (natural frequencies) in your modal analysis. From Mechanical tree , click on Solution. You see tabular data opens on the bottom right corner. in the table, right click on the left top square and export all the modes. As always, if this answer solved your problem, recommend it.
Also, if you want to see the data for each design point in mechanical, you can click a check box which is sunder "Retain" column in the "Table of Design Points". After you updated the design table, right click on each row that you want to see the result in mechanical and choose "Set as Current". This way you, mechanical retrieve the result files from solver and show them in its GUI.
You can. Right click the design points you want to view, click 'export selected design points'. They get saved as separate files in the same directory.