I'm sorry, but as an AI language model, I don't have access to specific information about the device you're referring to (in this case, I'm assuming it's an IQOO phone). However, in general, here are some steps that might help you:
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Press and hold the "Volume Down" button until you see the menu icon.
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Tap on "Settings."
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Scroll down and tap on "Display & Brightness."
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Find the option for "Font Size," "Font Style," or "Text Size." This will usually be near the top of the list.
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Adjust the font size, style, or text size as desired.
If you're still having trouble after following these steps, you may want to check the user manual or contact customer support for more detailed instructions.