Hello again, Thank you very much for your elaborate reply. Truly appreciated. Usually, when scanning documents, the ADF of my printer is used (i.e. the Automatic Document Feeder). Frankly, not being an expert at all, Acrobat is mostly set to use its default settings. For example: vainly searched but did not find any settings relating to scanning, specifically how to disable 'Optimize Image' by default. It is something one tends to forget when starting the next scan, so the result may be blurry again, hence the scan should be performed again... Any suggestions? Another example: all these years, after scanning, or whatever, Acrobat showed the page in a different size (not 100%). It could be 108%, or 112%, so I changed it to 100% in the dropdown. Didn't know what and how to set this in the Preferences > Page Display. I know, it is just a minor thing, but still... Just now, whilst writing here and going thru the settings again, I think... I have found it. Peferences > Accessibility: Override Page Display v Always use Page Layout Style: Single Page v Always use Zoom Setting: 100% < instead of 'Fit Page'. As for the PDF size, to be honest, I do not care too much. Diskspace is cheap, some of my PDF files are 500-600 and one even 750MB. As for PNG converting I have set this as below. I believe this is correct for the best possible results? I know about TIFF being the best possible format (huge format), however, in my case, considering that usually any image that may require converting, are screenshots only. Below are the settings.   Again thanks for your help!
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