1 Click Storage. 2  Select Backup from the items listed. 3  Select one of the device backups, then click Delete. 4  When you're asked to confirm, choose Delete if you want to turn off Backup and remove all backups for that device from iCloud. 5  When you delete a backup, it also turns off backup of your device.OS. You can use these steps to manage your files from your iPhone, iPad, or iPod touch: 1  If you're using an earlier version of iOS, tap Storage & Backup, then tap Manage Storage. 2  Tap the name of the app that's using iCloud Drive.
A section is a cut through the 3d-model. An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane.
Any given volume of air has density. The density of air can vary from place to place and from time to time. The difference in barometric pressure between observation sites at different elevations is a measure of the density of air in a column of air between those two elevations. Cold air is denser than warm air.