EXFO FTB-8500 Series for FTB-500 - Manual (Page 381)

System Tabs
Ethernet and Fibre Channel Application 367
Preferences

Test Time Display Mode: Allows the selection of the test time mode
displayed in the Logger panel. The default setting is Relative.
Relative displays the time elapsed since the beginning of the test for a
test event.
Absolute displays the date and time of a test event.
Page Management

Reset to Display Default Pages Layout when enabled, resets the page
layout to its default layout each time a test is modified.