How to change thread title?

[MarcoRome]

Is possible ?
Time ago I changed the title, but I do not remember how I did it

 

[TheJinJ]

There is a drop down to the right under the title called Thread Tools, it has the option to edit the title

 

[MarcoRome]

There is a drop down to the right under the title called Thread Tools, it has the option to edit the title

Thank you very much