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  • If AltGr is level 3, what does "third level of Left Ctrl" mean as a Compose key? Commented Jun 26, 2021 at 13:51
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    Sorry, for the confusion, I was a bit unclear: AltGr is the modifier, the third level of e.g. a is accessed AltGr+a. So starting compose key mode via LeftCtrl would be using the 3rd level modifier with left ctrl, i.e. AltGr+LCrtl. Commented Jun 26, 2021 at 13:54
  • Is AltGr the level or just a key that gives access to a "level". And does a level mean a set of characters that become accessible? It is this getting a third level for a layout? Commented Jun 26, 2021 at 13:58
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    What "level" are the Ctrl-Alt-F1..12 key press combo's? I'm asking because I have a 60% keyboard with 5 rows of keys, and I can't toggle tty1-7 consoles in Debian. My f1-f12 keys are all combined on the number row, and are typed using the Fn shifter key. But an additional Fn shifter key has no affect in keypress combinations with Ctrl-Alt modifiers. But it doesn't work with the Ctrl-Alt-F1..7 key combos to change consoles. Anyone have an idea how to help? Commented Feb 12, 2022 at 17:57
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    @user12711 - This is depending on the keyboard layout. Normally F keys have no such levels at all. You could maybe find a layout fitting your special keyboard. You should ask a separate question with all details. Commented Feb 28, 2022 at 12:21