how to activate add symbol button in watch windows?

thanks to all!
is there anyone who knows how to activate the "add symbol" button?
it was perfectly working before with diferent scripts and pics and after I went around the menus, suddenly disappear and dispate trying anything I havn´t been able to activate back again.
What is been seen is like the picture attached= "watch1"

thanks for reading it
See you!!

Symbols are variables... make sure you have some in the code heh....

AtomSoft said:

Symbols are variables... make sure you have some in the code heh....

Click to expand...

but, if the same script (project), we use them back again, and they were working with the buttom add symbol "on" before for long time, how can they now have a change in the definitions if I haven´t change the definitions on the headings?.
thanks