Hi everyone,
Good day,

I have doubt about how to add control in "general" group in design on "Ecoresproductdetails" form, so i personalized that form then got that form name then i did try to add stringedit controll in design but i couldn't that because i couldn't see the group in design on that form,but in i just personalized that, i can see that like i mentioned below pic

but i couldn't see in the design on form (i mentioned the pic in below) ,i think may be top "tab" showing like locked icon so it's not showing.

Now, My doubt is what is that locked icon?, then how to add control in that group?
Thanks in advance.