How does dpi work in Indesign ?

[Alluring_Dolphin15C3]

Hello,

I want to make a photobook and the supplier offers an Indesign template which customers can use for creating the cover and the innerwork. 
https://www.fotofabriek.nl/pdf-upload/view-specification/243f5ab3-f5c1-48cf-aee5-7ef1d2f1365e/

I have downloaded the template for the innerwork and it's going to be an A4 book (landscape), so the size is 210x297 for a page, making it 216x303 for a single page, and 216x600 for a spread of 2 pages (not 606 because you only have 2 bleeds in stead of 4, if I'm correct).

So in Photoshop I have created my first test-spread (2 pages) and I have set the image-size to 216x600 (300 dpi) and filled it for test purposes with pink.

But when I place that image into the template it shows the image way too large for the template (see image). Why is that? 

[rob day]

Hi @Alluring_Dolphin15C3 , If you check the Image Size of a 600x216 pixel document set to 300PPI in Photoshop with the units set to Inches, its output dimensions will read as 2" x .72" inches (600/300 = 2 and 216/300 = .72):

When you place the document in InDesign at 100% its Actual and Effective (the scaled output resolution) will both be 300 PPI (see your Links panel):

If you increase the scale of the image (748% below) the Effective PPI is adjusted to reflect the scale amount (40 PPI below)

[Willi Adelberger]

DPI does nothing in InDesign or Photoshop. It is the unit for printers. I suppose you mean PPI, pixel per inch. Look into your export settings, how they are recalculated. It is never higher than the original. Maximum the resolution you put in.

[Alluring_Dolphin15C3]

Hello Willi, yes sorry I was meaning PPI. The test image I created was like this:

[rob day]

Sorry I read too fast and thought you were working in pixels.

The I in PPI is Inches, so set your ruler units in both Photoshop and InDesign to Inches:

The placed file at 100%:

[Mike Witherell]

Hi A-D,

When I followed your steps, my file placed perfectly. 

The 213x600 should be carefully defined in Photoshop as mm; not pixels; at 300ppi when making the Photoshop file.

[Alluring_Dolphin15C3]

Thank you all for your answers.

@Mike Witherell  I think I did that, see the screenshot