Change advanced settings in Den on iPad
Adjust less frequently use viewer options and access language support and maintenance tools.
Open the Settings app
Manage access to system resources, change your preferred language for Den, and enable Web Inspector for the viewer from Den’s page in the Settings app.
Viewer
Prevent Media Autoplay
Require interaction before videos and audio begin playing in the viewer.
Perform Maintenance
If you are experiencing poor performance after having not used the app for a long time or after sweeping changes to your library then manually performing maintenance may help.