The centre on aircraft button switches between to different modes:
|Map is stationery, own aircraft symbol moves on the screen
|Own aircraft symbol is fixed on the screen, map moves below it
When active, the own aircraft symbol will stay in the middle of the page (with the exception of Track Up mode, where the icon will appear in the lower third of the screen – to show more of what is ahead).
If you need to look away from that position, simply pan the map and the lock will unlock.
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