Audio Systems: setup, arrow keys, rotary knob

Question
how can i change the time on clarion pro audio arx8570z

Answer
Here is what is says in one model similar to yours:

Setting the clock
1. Press and hold the [T] button for 1 second or
longer to switch to the adjustment selection
display.
2. Press the [a] or [d] button to select
“CLOCK”.
3. Press the [ ] button.
4. Press the [a] or [d] button to select the
hour or the minute.
5. Turn the [ROTARY] knob clockwise or counterclockwise
to set the correct time.
* The clock is displayed in 12-hour format.
6. Press the [ ] button to store the time into
memory.
7. Press the [T] button to return to the previous
mode

The [ ] are arrow keys to press.