How do I divide a page into even rows for a comic layout?

[realm88]

Hello everyone.  I'd like to have 3 rows of panels for a comic book.  I've figured out how to align my page into colums, but not rows.  Must I insert a giant table in order to have even row lines on my page?  Using the "preferences-->gridlines" I am only able to set fixed distance gridlines (i.e. 2 inches apart) rather than proportional gridlines (i.e. divide the page into thirds).

What is the easiest way to display gridlines on my page that are in perfect thirds, and also inside my margins?  Thanks so much!

[Willi Adelberger · Accepted solution]

Make guides. In the layout menu you find a command to create multiple guides and columns with guides, or drag them out of the rulers.

[realm88]

that was easy!  thanks so much, saved me a big hassle.   

[Dave Creamer of IDEAS]

You could use the Layout>Create Guides option: