The Kobo Aura featured several improvements to its immediate predecessor, the Kobo Glo. The screen is now a flat plastic panel, featuring an 'edge to edge' display without a raised border found in predecessors. It uses E Ink's Regal waveform technology along with Pearl HD, eliminating the need for a black refresh screen previously occurring every few pages. The touch screen, now based on capacitive touch, is more responsive than the infrared touch present in its previous products and allows for the use of multitouch. This can be used to control the frontlight built into the device, as well as pinch-to-zoom when reading PDF documents.