Adjust Smart Sidebar Opacity
When the Smart Sidebar floating bar sits fully opaque on the edge of your screen, it can cover subtitles, icons, or app content behind it. On Coloros, the handle transparency is adjustable, so you can make it blend in during games or video playback instead of standing out. Left at the default level, many users find the handle too bold for everyday use.
Set Pop-up Window Display Duration
If a pop-up notification disappears before you can react, or stays on screen longer than needed, the display duration set by the app is the reason. On Oppo phones, each app decides how long its pop-up window stays visible unless you override this with a fixed action time. This becomes noticeable with quick system alerts or app confirmations that flash by too fast to read.
Auto-Arrange App Icons on the Home Screen
If new apps always land in the next open slot instead of where you tapped, Icon autofill is likely turned on. This ColorOS feature keeps every app icon sorted in reading order, left to right, line by line, and blocks manual placement anywhere else on the home screen. Icons can only move within that fixed order until you turn the feature off.
Change Alarm Volume
On Oppo phones running ColorOS, the alarm volume is one shared setting for all alarms, not something you adjust per individual alarm. If one alarm feels too quiet or too loud, you cannot fix it in isolation without affecting every other alarm you have set.
Delete an Alarm
If your Oppo phone keeps ringing at a time you no longer need, an old alarm is probably still sitting in the Clock app instead of being removed. Alarms pile up fast after schedule changes, trips, or one-off wake-up calls you forgot to clear. Removing them one by one or several at once keeps the alarm list from getting cluttered.
SMS Delivery Reports: Turn On or Off
If you can never tell whether a text actually reached the other person, your Oppo phone probably has delivery confirmations switched off. The feature that sends you a status update once an SMS lands on the recipient's device sits inside the Messages app and is disabled out of the box. On dual SIM phones it also behaves differently depending on which SIM sent the text.
Adjust Display Size
If app icons, images, or entire menus look too small or too large on your Oppo phone, adjusting the font size alone will not fix it. Display size scales interface elements independently from text, changing how much content fits on the screen at once. Getting this setting wrong can make apps feel cramped or leave icons oversized on the home screen.
Delete an SMS Conversation
Deleting a long text thread message by message on ColorOS wastes time when all you want is the whole conversation gone. A quick long-press on the conversation itself skips the manual cleanup and removes every message in it at once.
Turn Call Vibration On or Off
On many Oppo phones, the handset gives a short vibration pulse the moment you pick up or hang up a call, even with the ringer silent. If that buzz feels unnecessary or startles you in quiet settings, it comes from a dedicated toggle in the calling settings, not from your general vibration or Do Not Disturb setup.
Change SIM PIN
If you want to swap out a SIM PIN that is too easy to guess or matches an old default code, Oppo phones handle this through a dedicated lock screen for the card itself, separate from your phone unlock code. The catch is that ColorOS will not let you set a new PIN unless you can still enter the current one correctly. If that PIN has been forgotten, this menu will not help and a carrier unlock becomes necessary instead.
Change Default Event Duration in Calendar
If every new calendar entry on your Oppo phone comes out as a full hour, even for a quick call reminder, the default event length in Google Calendar is set too long. This gets worse when several accounts are linked, since each one can carry its own default. Manually shortening every single event afterward wastes time and gets annoying fast.
Turn Gesture to Take Photo (Show Palm) On or Off
If your Oppo camera keeps snapping a shot every time you raise an open hand in front of it, the Gesture to take photo (Show Palm) feature is doing exactly what it was built for. It watches the frame for a palm and fires the shutter automatically, which is handy for hands-free selfies but annoying when a hand passes by accident. Whether you want it running or off depends on how you actually use the camera.
Turn Lens Stain Detection On or Off
If your Oppo camera keeps flashing a dirty lens warning even after you wiped it down, the automatic lens stain detection is misreading brightness patterns near the edge of the frame. This ColorOS check can misfire in low light, with wet fingers, or when a case sits close to the lens ring. Switching the feature on or off changes how often that banner shows up while you shoot.
Turn On/Off Autofill Service
If a form keeps suggesting old addresses, outdated passwords, or the wrong Google account whenever you tap a field, the Autofill service on your Oppo phone is likely still linked to a provider you no longer want active. This often happens after switching Google accounts or installing a password manager that never became the default. Turning the current service off - or picking a different one - is the only way to stop the wrong data from popping up.
Move Widgets on the Home Screen
A widget on your Oppo home screen sometimes ends up on the wrong page or crammed between app icons where it does not belong. A short tap just opens the widget or its app instead of letting you drag it. Knowing how long to hold before moving it keeps the widget from jumping back or landing in the wrong spot.
Lock Screen Sound On/Off
Locking or unlocking your Oppo phone stays silent by default, so you never hear an audible cue that the screen actually locked. If you rely on that click as feedback, the missing tone can make it seem like the lock did not register. The toggle controlling this sits inside the sound and vibration settings, separate from ringtone and notification volume.
Turn Do Not Disturb On or Off
If your Oppo phone stays completely silent even for important calls, or if it keeps buzzing when you actually need quiet, Do Not Disturb is likely misconfigured. The mode mutes sound and vibration system-wide and can hide notifications or let selected exceptions through, so getting the toggle and its options right matters. Many users only find the switch by accident because it sits inside the general sound settings rather than its own menu.
Adjust Screen Brightness (Manual & Automatic)
When the screen stays too dim indoors or turns painfully bright at night, auto-brightness on your Oppo phone is likely misreading the light around you. The quick slider in the notification shade only gives a rough fix, and many owners never open the full display settings where the actual control sits. Switching between automatic and manual mode changes how reliably the screen matches the room.
Ringtone Volume Settings
If your Oppo phone rings too quietly or too loudly during calls, but notification sounds seem fine, you are likely looking at two separate volume sliders. Ringtone volume and notification volume run on independent controls, so adjusting one does not touch the other. This mix-up leads many users to think their phone volume is broken when it is just set on the wrong slider.
Set Date and Time Automatically
If your Oppo phone shows the wrong time or date after a SIM swap or a trip abroad, network time sync has likely been switched off. This setting decides whether ColorOS keeps the clock updated from your carrier network or waits for you to enter it manually.
Change Device Name
Your Oppo phone shows up as a generic model number like Reno 2 in Bluetooth lists, Wi-Fi Direct transfers, and shared network folders. That makes it hard to tell your device apart from other Oppo phones nearby, especially in a household or office with several units. Renaming it fixes the confusion in every app and connection that reads this system label.
Add Emergency Information
If you collapse or end up in an accident, paramedics often can't unlock your phone to check your blood type, allergies, or medications. Oppo lets you store that medical profile so it shows up during an SOS call, no passcode needed. Without filling it in, first responders only see your name and photo, not the details that actually matter in an emergency.
Send an SMS Text Message
If your Oppo phone defaults to a chat app and you can't find a plain SMS option, the native Messages app is often overlooked once internet messengers take over daily chats. This leaves some users unsure where to start a new text conversation or how to reach a contact who does not use a messaging app. A quick look at the Messages app clears up where the SMS function actually lives on Coloros.
Set Time Manually
If the clock on your Oppo phone refuses to change no matter what you tap, the phone is still pulling the time from the mobile network. As long as 'Use time from network' stays active, the manual time field is locked or simply not shown inside Date & time. Turning that toggle off is what unlocks the option to type in your own time.