What is mean `LV_BTN_STATE_TGL_REL` and `LV_BTN_STATE_TGL_PR`?

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#1

I want to mean for ‘LV_BTN_STATE_TGL_REL and LV_BTN_STATE_TGL_PR’.

Do you know the examples for LV_BTN_STATE_TGL_REL and` LV_BTN_STATE_TGL_PR '?

#2

They indicate “release” and “press” events respectively (LV_BTN_STATE_TGL_RELease and LV_BTN_STATE_TGL_PRess). I agree the documentation is ambiguous on the matter even if it might look obvious.
They are used to specify input events (button press and release).

#3

In addition to what @Mattia_Maldini pointed out the TGL in the name indicates that the button is also in toggled state (independently of being pressed or released).

#4

The example in docs could help to clarify it further.