Lina Albis

Hi ,
I want to crop my image into 11x15 or 15x11 for print . Should I use the Ratio or WxHXResolution on the crop tool ? I tried both and when I checked on the image size tool box , the result from both ended up different . Which one do I need to use or are those both ways don't matter or just the same ?
Here are the pictures of the crop tool when I did it .

Thanks
 

1 hour ago, Christina Keddie said:

Why are you changing the resolution?  Note that the resolution number means DIDDLY SQUAT unless and until you're defining the width and height parameters in terms of inches -- PPI stands for "pixels per inch," and there ARE no "inches" until you define them as such.  So the default resolution number of 72 means exactly nothing.

If you need something to be in 300ppi, that generally means you're prepping something for print -- i.e., doing something where "inches" actually means something.  And it's also likely that you're going to need to change the SHAPE of the file as well as the size -- your files are in the 2:3 aspect ratio coming out of your camera, which is the same shape as a 4x6 or 8x12 or any other multiple of 2:3, but is a different shape from, say, an 8x10 or an 11x14 or a 30x40.  If you need to change the shape as well as the size, the Image Size dialog box won't work for you.  You need the crop tool to do that.

And since you're often going to need to change both the shape and the size, you may as well always use the crop tool.  This way, too, you are always aware of both the shape and the size of your output file.

Thank you so much for the explanation.I found out today that actually I don't need to worry about my dpi or resolution.
I changed it into 300,just because I wanted to get better picture when it print,that was my thought all this time and I didn't know that was wrong.
So how to get 300 ppi for print?Is it by using the crop tool,let say I click the WxHXResolution box and I put 8x10 and I put resolution 300.Can I do that and put my resolution 300 in that crop tool box?

17 hours ago, Christina Keddie said:

There's no need to change it.  It's an infinitesimal difference and has no bearing on your file -- and you really should get out of the habit of using the Image Size dialog box to make any changes to your file sizes.

Ok thank you
So basically to change the sizes I have to using the crop tool box,instead the image size dialog box?even if I only want to change the resolution,for example from 72 to 300?

Yayyy,so I did it right?Finally!Is it ok if I correct the width and change it exact 11 just like picture I attached below

and then I checked the image size,it came out this result.
Am I doing it right or not?

Ok I did the crop tool as well.Let me show you the picture.
Is it right?

Ok,is it like this picture below?But why I can't get exact 11x15 instead 11x16.5 and the resolution become 72.What did I do wrong?
Thanks

Thank you.
I read your article on the link above and I tried it,but it didn't work  I tried it using my photoshop cc.
I attached picture and can you please tell me what I did wrong base on the picture below.And do you have any video tutorial to do the crop 11x15?
Thanks