How can i choose my Thread that belongs to which Theme

Hello again,

For better or worse this forum doesn't have "themes". It's just one continuous list of threads on various subjects. Best bet is to make sure your thread heading describes the subject of your question/discussion as clear as possible, with the smallest number of words. This makes it easier for people to decide if they want to open and read the thread and also helps for future searches when researching a subject that may have previously been discussed.

Cheers
Greg.