Super User Asked by beginner_ on March 2, 2021
I realized that PowerPoint is removing all image metadata (PNG). In my case the metadata contains the data from which the image was generated. (chemical structure). The idea would be to put these images into presentation but still be able to later extract the information. However this fails because PowerPoint removes it.
Is there a setting to make power point conserve custom metadata?
EDIT 9th November:
I’ve learned that when looking at the content of the pptx file (unzip) the original image with all metadata is present. However once you export or copy it from within the presentation, it’s "converted" loosing said metadata.
The answer to my question seems to be "No, this can not be changed".
However as I wrote in the question, the original image is stored inside the document. One can unzip the pptx file and then get access to all the images in the presentation.
The good part about this is that it can be automated. So I consider the issue solved.
Correct answer by beginner_ on March 2, 2021
If you really want to embed a certain image in its original form into a powerpoint presentation, your best bet is probably to use the feature of embedding objects / content. So you have to insert these images twice into the document:
once as a regular image (which might be compressed and lose its meta data)
once as an embedded object (which is displayed as a small rectangle with the file name, and which can be extracted later again from the document)
I would place the latter nearby the related visible image, so one can find it easily later on, but at a place where they don't disturb anyone. If you still think the embedded rectangle must not be seen during presentation, you can try to hide it in presentation mode, only show up in edit mode. Such an effect can be accomplished for example by assigning an animation to the object which will make it appear only after >1hour (or more).
However, I would consider if that is really necessary. It may be simpler to bundle the original image files with the pptx file utilizing a zip folder.
Answered by Doc Brown on March 2, 2021
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