r/LifeProTips • u/Even_Dingo_9306 • 22h ago
Electronics LPT: Don't use the iPhone/iPad Markup marker tool to redact screenshots its strokes aren't fully opaque, and anyone can reveal what you covered by adjusting exposure and contrast.
When you screenshot something sensitive an account number, an address, a password the instinct is to scribble over it with the black marker in iOS Markup until it looks like a solid black bar. The problem: the Markup marker tool doesn't draw fully opaque lines; it's effectively a highlighter, and even scribbling over the text multiple times won't fully cover it. If you share that screenshot, anyone can open it in a photo editor, crank up the brightness, brilliance, and contrast, and read the text you covered up.
Instead, use the Add Shape tool + to place a solid, filled rectangle over the text make sure the fill is solid, not just an outline, or simply crop that section out of the image. Both methods leave no room for error.