# Cannot adjust covers with CMYK color model (and parts are displayed black)
**URL:** https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302
**Category:** Support
**Created:** [December 22, 2020, 5:30pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302 "2020-12-22T17:30:41Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@SpirosG](https://community.mp3tag.de/u/SpirosG)
#### Post date: [December 22, 2020, 5:30pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/1 "2020-12-22T17:30:41Z")
Hi, it seems that mp3tag is not able to adjust some covers.
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [December 22, 2020, 5:41pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/2 "2020-12-22T17:41:19Z")
What is anybody supposed to do with such a global statement?
Please supply a lot more details.
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### Author:  [@SpirosG](https://community.mp3tag.de/u/SpirosG)
#### Post date: [December 22, 2020, 5:42pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/3 "2020-12-22T17:42:14Z")
I've sent a file to @Florian to test it! 😉
Mostly these files are coming from the same source.
For an unknown reason the cover size is ~20MB and the resolution is 5000x5000
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### Author:  [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [December 22, 2020, 5:44pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/4 "2020-12-22T17:44:09Z")
See this thread on the maximum size of pictures:
> [@Bitmap size in pixels and something at Gibson forums](https://community.mp3tag.de/t/bitmap-size-in-pixels-and-something-at-gibson-forums/45674/9):
>
> According to the id3 standard " the tag . Maximum tag size is 256 megabytes and maximum frame size is 16 megabytes" So I would say that the maximum size of a picture is 16 megabytes. Any other restrictions then apply to particular players - and as there are so many, it is hardly possible to guarantee any size to be foolproof. One still has to try it with every target system. The only thing that can be said: MP3tag will support you to adapt the tags to the needs of the target system.
(and so it is most likely no MP3tag problem)
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### Author:  [@SpirosG](https://community.mp3tag.de/u/SpirosG)
#### Post date: [December 22, 2020, 6:03pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/5 "2020-12-22T18:03:19Z")
I found another file with the same problem...
The cover size is 1MB and the resolution is 1253x1253.
I'm uploading it now for @Florian
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### Author:  [@Florian](https://community.mp3tag.de/u/Florian)
#### Post date: [December 22, 2020, 6:28pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/6 "2020-12-22T18:28:22Z")
Thanks for the example files. The images are using the CMYK color model, which is only barely supported by GDI+, the image library I'm using.
You're already seeing the issue in the Tag Panel, where parts of the image a drawn in black. You'd need to resort to an external application and adjust the covers manually.
I'm also moving this to #support and adjusted the topic title. I'm treating it as a limitation of the feature and it's on my "won't fix" list.
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### Author:  [@SpirosG](https://community.mp3tag.de/u/SpirosG)
#### Post date: [December 22, 2020, 6:34pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/7 "2020-12-22T18:34:17Z")
Thanks for the support @Florian.
You are right about the black part, i was wondering why this could be happening!
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### Author:  [@system](https://community.mp3tag.de/u/system)
#### Post date: [January 21, 2021, 6:34pm UTC](https://community.mp3tag.de/t/cannot-adjust-covers-with-cmyk-color-model-and-parts-are-displayed-black/51302/8 "2021-01-21T18:34:22Z")
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