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If I understood you correctly you want to set hint example inside of you Full Name field. To do that select your Full Name field inside of Form Builder, click on Hint Example option and enter name that you to appear when you preview the form.
Here is my demo form: http://form.jotformpro.com/form/51936275495972?
Hope this will help. Let us know if you need further assistance.
suggest me how to crate name hint
You can create a name hint by clicking on the text box or input field and change the value in the "Hint Example" option, as mentioned by my colleague above.
Please do make sure to create or open your own thread here in the forum for us to better assist you.