It’s actually very easy to change the DPI of the Logitech G502 Mouse without using software, namely Logitech G HUB or Logitech onboard memory manager, let me go straight to the tutorial.
Also Read: Logitech G502 Mouse Software
The following Tutorial on How to Change DPI on Logitech G502 Without Software.
you can directly in the picture below.
you can press the G7 button for DPI UP and G8 for DPI Down.