The notification previews on my lock screen have so low opacity that I can't read the text sometimes, is there a way for me to increase the opacity so the image on the lock screen isn't visible through the notifications?
On some models we have a transparency setting that you can modify if you go to: Settings > Lock screen and security > Notification > Transparency. Try changing this setting and see if that helps.
If you do not have this setting on your phone, we recommend that you get in touch with our customer service and they will help you further. Information on how to contact us can be found here: https://www.samsung.com/se/support/contact/