90 Keysight InfiniiVision 1200 X-Series and EDUX1052A/G Oscilloscopes User's Guide
9 Display Settings
1 Once the [Quick Action] key has been configured, press it to freeze the display.
2 To un-freeze the display, press [Quick Action] again.
Manual cursors can be used on the frozen display.
Many activities, such as adjusting the trigger level, adjusting vertical or horizontal
settings, or saving data will un-freeze the display.