What is the purpose of the footrest? May 7, 2025 The LiberNovo Omni is available with optional footrests in two different heights: 8.8cm for those 170-190cm tall, and 13.5cm for those 158-169cm tall. These are designed to match the 75cm height of fixed desks common in Asia, and are intended to stabilize your sitting posture. Similar to the Humanscale footrest accessory, the Omni footrest can be adjusted to your preferred height. Back to blog Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window.