Percentage

When to use percentage?

Use percentage prior to embed images into documents

Let's compare a document containing a resized image with a document containing an original image.

We take an original image taken with a 16MP digital camera. Then we integrate it in a document once as original and once resized at 25% percent.

We take

Original image	100%	3.4 MiB	DSC00839.JPG
Resized image	25% Quality 80	146KiB (24xsmaller)	DSC00839_25.JPG

We get

Document with original image	in LibreOffice format	3.1 MiB	Resize_Percentage_full.odt
	in PDF format	2.3 MiB	Resize_Percentage_full.pdf
Document with resized image	in LibreOffice format	203 KiB	Resize_Percentage_25_80.odt
	in PDF format	145 KiB	Resize_Percentage_25_80.pdf

Let's look at the difference

We open both document with a zoom factor of 100% and look at a detail in the picture on the screen

Document with embeded image

Document with the original image

Zoom on detail of an embeded image in original size in a document

Document with the resized image

Zoom on detail of an embeded resized image in a document

You don't see any difference? We don't see it either.

For the viewer, the quality is absolutely the same on screen and hardly noticeable on printed document.
The size is 16 times smaller, resulting in 16 times faster email sending and receiving, 16 times faster coping on USB stick and 16 times faster load from web.

Conclusion

Resize your digital camera picture to 20% - 30% of the original size prior to embed them into documents.