How to adjust the Z-axis spacing?

[duxuan11]

The input data 3d volume, but its Z-axis height seems to be equal to the number of images, rather than the real Z-axis maximum and minimum values, may I ask where can I input Z-axis data in order to look more accurate in 3d visualization.

I know that in imagej it has max and min representing the range of the z axis.

[psobolewskiPhD]

Are you trying to set the scale of the stack?
The attached image is really hard to decipher, but:
If you have 52 inches over 62 slices, then you have .839 in/slice.
In napari you can set the scale of a layer using:
viewer.layer['name of your layer'].scale = [.838, 1, 1]
Here I set the z-scaling based on your post, while x and y are left as 1, so 1 in per pixel.