What does "Save Image Pyramid" do?

[Melquiades002]

Looking at TIFF Options pane and curious about Save Image Pyramid. What action does it perform? Thanks.

 

[c.pfaffenbichler · Accepted solution]

https://helpx.adobe.com/photoshop/using/saving-files-graphics-formats.html

[Kukurykus]

Is it like inDesign can have document with layers that each has different resolution?

[c.pfaffenbichler]

I am not sure I understand – in Indesign one can combine any number of pixel images of different effective resolutions. 

Whether an exported pdf resamples them to the same resolution depends on the settings used when exporting. 

[D Fosse]

In Photoshop, image pyramid refers to the cached versions at smaller pixel dimensions, pulled up when you zoom out.

I have no idea why there would be any benefit to saving that with the file.

[TheDigitalDog]

And further (on TIFF options):

http://digitaldog.net/files/TIFFvsPSD.pdf