Select Create > Spec Table > Size Range Table from the main menu to display the
Create Nominal Bore Table window.
Enter a Name to be assigned to the new Nominal Bore Table.
Click OK to create a Nominal Bore Table (NOMTAB element) and display the
Size Range window.
Highlight bores in the Available Nominal Bores (mm) list by left clicking on the desired bore size. Multiple bores can be selected at once by left clicking and dragging the mouse pointer. To remove particular highlighted entries hold down the
CTRL key and left click on a bore size.