Changing dpi on Photoshop

[2bbride]

I was done creating my photobook but I was told to change my image resolution from 72dpi to 180dpi. Can somebody tell me how to do this using Adobe Photoshop?

It seems like I have to redo everything and I need to order my photobook before my wedding on Aug 2. I'm really getting nervous!

Please help - thanks!

[KPJr2181]

Not sure what photoshop you have, but I have 5.0 and here is how you can resize an image...

To change the print dimensions and resolution of an image

You can change the physical printed size and resolution of an image without resampling. You might need to do this if you are sending the image to a print shop that requires files be at a specific resolution.

If you are printing directly from Photoshop Elements, you don?t have to perform this procedure. Instead, you can choose a size in the Print dialog box and Photoshop Elements applies the appropriate image resolution.

Note: If you want to change only the print dimensions or the resolution and adjust the total number of pixels in the image proportionately, you must resample the image. (See To resample an image.)

1. In the Editor, choose Image > Resize > Image Size.

2. Make sure that Resample Image is selected. If deselected, you can change the print dimensions and resolution without changing the total number of pixels in the image, but the image may not keep its current proportions.
Note: Resample Image must be selected in order to use the Constraint Proportions and Scale Style functions.

3. To maintain the current proportions of image width to image height, select Constrain Proportions. This option automatically updates the width as you change the height, and vice versa.

4. Under Document Size, enter new values for the height and width. If desired, choose a new unit of measurement. Note that for Width, the Columns option uses the width and gutter sizes specified in the Units & Rulers preferences.

5. For Resolution, enter a new value. If desired, choose a new unit of measurement.

6. Click OK.