DASORs are broken down into sections and each section is displayed in its own Tab in ASIMS. If you need to edit the data within a tab, navigate to the tab and then click the Edit button on that tab. After making the required changes you need to click the Save button before navigating to a different Tab.

Warning: If you try to navigate away from an edited tab without saving your changes a warning message is displayed, you must click Cancel on the warning then click the Save button on the tab before leaving the page.
ASIMS Tip
DASOR Tabs
Alert Window
If an edited tab is unsaved, when navigating to a different tab, an alert will warn you, you may lose data on your current tab.
Tab Save button
If you have edited a Tab, click the Save button before navigating to a different tab.
asims.ice.mod.gov.uk says