After Resize the Photo

[akmu]

Done as below :

1.  Cnrl+N

2.  Dragged a picture from desktop. 

     This picture size was 1.5 width and 1.7 

     height.

3.  Then cropped the picture to edit. 

      Then size became 5 inch width and 5.6 

      inch height. 

How come item number 2 and item number 3

became big size difference.  Both are 100% zoomed.  Please explain in detail.  I am in beginner stage. 

[Kevin Stohlmeyer]

Check your resolution in the crop tool settings. Remove 300 ppi and it will retain the same resolution but crop to the size you want.

[macpawel]

Yes kstohlmeyer1 is right,

Try to set Crop settings right. Be carefull with dimensions and resolution

Check also your new document and your picture resolution.

If you merge documents size (inches, cms) are not important. Check pixel dimensions - it's matter

Pawel

[akmu]

Please explsin dimensions and resolution in detail. 

[Kevin Stohlmeyer]

Look at your options bar at the top of your screen with the crop tool. You have your W and H set, but also a different resolution (300) which is changing the overall size of the image.

This link will explain the math behind WxHxRes = image size.

https://helpx.adobe.com/photoshop/using/image-size-resolution.html 

[akmu]

You said remove pixel 300.  I dont know why.   Why pixel dimensions showing w 450 h 510 in default.  Still 

I dont know what is the use of  pixel dimensions.  Please explain in your own instead of sending me web address.  

Is there anything to click from : 

   Scale style

   Custom propotions

   Resample image

What is the difference from pixel/inch and pixel/cm in document size.