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Show/hide JCE Editor
Toggle the highlighted link top left above.

Enlarge edit screen area
Drag lower right corner highlighted above.

Remove unwanted spaces in page layout

• Click at place where you want to remove unwanted space. Hit Delete key on keyboard. Also try Backspace key. If this removes too much, use the undo button.
• If that doesn't work, click the show/hide link and find the place with too much space. Remove extra <br> (line break), <p> (begin paragraph) and </p> (end paragraph) tags.