1. Navigate to the Setup Panel.
2. Open the Brand Editor
3. Navigate to the Custom Style tab of the Brand Editor.
4. Tick the checkbox “Fix navigation bar to bottom of the screen”
This moves the Next or Back button in an Interactive Site directly under the form above it, instead of spacing it near the bottom of the page. (This is ideal if your interactive form is short and you don’t want a large blank area on the page before the Next button.)