c# - Words in transparent PNG have jagged edges -

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I created an app that is transparent to display overlays for users to tap using WPF and C # Uses PNGs. However, there are weird jagged edges around words, would it be more than the C # / WPF limit or Photoshop problem?

The screen resolution is 720p, the app runs on Win7pro.

Screenshots:

There is a problem with seeing the image against a black background on my phone, I see a single fringe, make sure that you make the text on a transparent background (i.e., do not remove the background with a magic wand ) And avoid a full alpha channel (32-bit PNG).


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