Gutter is the blank space between columns. For changing Gutter, follow these steps:

1. Highlight the text you wish to change and go to the Gutter field from the text editing toolbar.

2. Establish the space you wish to have between your columns by using the left arrows.

https://cdn.elev.io/file/uploads/Nx6j1ilgYkjKwwUzxKv9Jx2yWyIGUZG4VbEE9W71H30/R1wh037e_QrTSU3O6JSRkgnvz3R6JBZR_WjAz1sxEF8/changing the gut.fw-t1c.png

3. Save your page when you're done or continue editing.