Add a field to FS00 - Control Data Tab

Hi Experts,

Is it possible to add a custom field to FS00 - Control Data Tab?  If not, can a new tab be added which I could add my new custom field to?  I know that I can append table SKB1 with the field, just struggling with how to get the users the ability to update the field. 

I have researched and have gotten mixed messages as to whether this can be done.  Per one of the recommendations,  I have created a layout via transaction OB_GLACC21 and assigned it to V_T077S_B; however, I do not see it on any new tabs or a change to an existing layout.  I have learned that I can change the description of the text fields via OBT7 but not doesn't really help me.

Thanks in advance for the help.

Gail