...otherwise, if you mean setting up a text box on a master page that, when applied to document pages, will allow you to link from one page to the next, then here's what you do:
1: On your master page, draw your text box/boxes.
2: With the linking tool selected, click on the link icon on the top-left corner of the master page.
3: Click on the first box on the page that you want the text to flow into.
4: Continue linking any other text boxes on your master page as normal.
Now, when you go back to your document and start typing, any overflow text will generate a new page, and continue.