Microsoft Access allows you to create tables with any number of fields that you would like to add to the design grid. There is no set limit to the number of fields that you can add to the grid. When designing a table in Access, it is important to consider the field types and whether you will need to store any data in those fields. To add fields to the design grid:

• Open the table in Design View.
• Click the white box in the lower left corner and select “Add Field” from the menu. This will open the Field Properties dialog box.
• Type a field name in the Field Name box.
• Select a data type for the field in the Data Type box.
• Set field properties like size, format, input mask, and so on.
• Click OK to save the field.
• Repeat steps 2-5 to add more fields to the design grid.

Once you have added all of the fields you need to the design grid, you can save the table by clicking the “Save” icon on the toolbar or using the keyboard shortcut “Ctrl+S”. You can then use the table in your Access database or export it to an external data source.

For more information on creating and working with tables in Access, check out Microsoft’s online documentation here.