how can i put a tr in noteworthy
As text, using the Text Expression tool. If you want it to sound, you will have to put in the notation yourself to emulate what you expect the "tr" to do. An example can be seen in the moonlite.nwc example.
See also: https://forum.noteworthycomposer.com/?topic=43, https://forum.noteworthycomposer.com/?topic=523, https://forum.noteworthycomposer.com/?topic=615