How to access DeX settings?

I'm curious about something regarding cryptocurrency and DeX settings. Could you please guide me through the process of accessing the DeX settings? I've been trying to find a clear explanation online, but I'm still a bit unsure about how to do it properly. Could you break it down for me in simple steps? Also, are there any specific requirements or precautions I should be aware of before accessing the DeX settings? Thank you in advance for your help.