The viewer starts lagging significantly on tablets/mobile devices (not on desktop/Mac) when overlays containing OSD buttons created with openSeaDragon.Button are removed The lag appears to be related ...

OSD button, multi-touch on-off slide from the left. By pressing the OSD button, you can configure the display related settings as follows.

Do you find the floating volume rectangle annoying? You can remove Volume OSD floating in Windows 10 or replace it with Windows 11 OSD.

6- OSD touch buttons eliminate the need for panel openings, improving product protection. 7- Scissor-foot ultra-thin keyboard with better feel, supports independent numeric keypad. 8- Independent "KVM ...