Screen layout for asset Master

Dear All Experts,

There is filed called "Type name" in Origin tab of Tcode AS01 / AS02.

I can enter / Change data for Type name by AS01 / AS02.

Now i want to make this filed as "Required" entry. i.e Mandatory entry should be there.

So i have tried to make change in

SPRO---> Financial Accounting (New) -

> Asset Accounting -

> Master Data ---> Screen Layout -

> Define Screen Layout for Asset Master Data

But this filed is not visible at screen layout of asset master data configuration.

I have searched sdn fourm and tried all suggestions but could not find any final solution.

Pl suggest me how to make filed "Type name" as reuired entry.

Best Regards

Swati Shah