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Photoshop english tutorial n.3 PDF Stampa E-mail

Crop with "Rule of Thirds"




Introduction In this Photoshop tutorial we will create a shape that can be used as some kind over overlay to crop an image using the Rule of thirds as a guideline.
The Rule of Thirds divides an image vertically and horizontally in 3 parts. The intersections of these imaginary lines suggest four options for placing the center of interest for good composition.
Also placing some of the main elements on one of these lines can improve the above image.
Often we would like to correct an existing image by cropping it in such a way that the composition improves by taking the rules of thirds in account, yet our crop tool only shows a single rectangle. This means that it's often a case of trial and error to get the right crop.
With a bit of effort it's possible to create a shape that can serve as some kind of "Rule of Thirds" overlay. In this tutorial I will show you how to create the shape and how to use it. Those who are impatient can skip the first step, download the original custom shape here (right click on the link, select Save target as... (in windows)) and continue

1. Create the shape

Go to the menu and select File / New... and enter 300 for Width and Height and click OK:

New document 300x300 pixels

In the menu select View and make sure Rulers, Snap, Guides and Document Bounds are all selected (they will have a Commit in front of them):

Rules, Snap, Guides and Document Bounds selected

In the Navigator palette select a zoom factor of 80%:

Navigator Palette

Note: if you can't find the navigator palette, then you probably have to activate it first; in the menu select Window / Navigator (it will then have a Commitin front of it).

Now move your mouse cursor until it's inside the vertical ruler, hold down the mouse button...

Vertical ruler

.... and pull out the first horizontal guide that you place at 0:

Vertical Guide

Continue to pull out 3 more guides. Place them at 100, 200 and 300.

When you're done, move your mouse cursor until it's inside the horizontal ruler, hold down the mouse button...

Horizontal Ruler

... and pull out the first horizontal guide that you place at 0:

Horizontal Guide

Continue to pull out 3 more guides. Place them at 100, 200 and 300.

Select the Rectangle Tool Rectangle Toolin the tool bar:

Tool Bar, Rectangle Tool selected

Check the option bar; make sure that Paths Paths and Intersect path areas Intersect are both selected:

Option Bar

Draw a rectangle in the first square that is surrounded by 4 guides:

First rectangle

Make sure that the edges of the rectangle snap to the guides. If you make a mistake, then press Ctrl + Z or Command + Z on the Mac to undo that step.

Fill the other 8 squares with a rectangle.

Select the Path Selection tool Path Selection Toolin the tool bar, click in the top/left corner outside the canvas, hold down the mouse button and move the cursor to the lower/right corner (aslo outside the canvas) to select all 9 rectangles:

Selecting all 9 rectangles

Go to the option bar and click on the Exclude overlapping shape areas icon Exclude Overlapping Shapes and the Combine button:

Option Bar

Your 9 rectangles are now converted to a single path:

Combined paths

Let's convert this path to a shape.

With the path still active, go to the menu and select: Edit / Define Custom Shape ...

In the window that opens up, give the shape a name. I name it Thirds. Click OK:

Shape Name window

Notice we can't see the shape in the preview in this same window, just a plain black square.
Don't you worry, the shape is there, it's just not visible.

Let's save the shape on our hard drive (for backup purposes) by going to the menu and selecting Edit / Preset Manager...

In the new window select Custom Shapes (A), select the custom shape that we've just created (B) (it will have a black border around it when we click on it) and click on the button that reads Save Set... (C):

Preset Manager - Save Custom Shape

Next give the shape a name (I named it thirds.csh) and click on the Save button.
Click on the Done (D) button to close the preset manager window.

You can download the file here (right click on the link, select Save target as... (in windows))

Let me now show you how you can load this custom shape in Photoshop (In the example it's not loaded yet)..

In the menu select Edit / Preset Manager...

In the window that opened select Custom Shapes (A), click on the button that reads Load... (B), select the shape and click on the Load button and the new shape will appear in our window (C).

Preset Manager - Load Custom Shape

Click on the Done (D) button to close the preset manager window.

Return to the menu and select View / Snap to turn off snap ( the Commitin front of snap will be gone).
Return to the menu and select View / Rulers to turn off the rulers.

Save and close the current file.

2. Crop with "Rule of Thirds"

Select the Custom Shape tool Custom Path in the tool bar of Photoshop:

Custom Shape tool

Make sure that the option Paths Path in your option bar is still selected.

In the option bar click on the button marked with A and then double click on your custom shape:

Selecting a custom shape

Open an image that needs to be corrected. Move your mouse cursor to the upper/left corner of your image and push and hold down the mouse button, move the cursor the the lower/right corner and release the mouse button (it doesn't have to be extremely accurate). The reason why we start like this is to store the aspect ratio of the current image. You'll see later what I mean.

Select the Path selection tool Path Selection Toolin the tool bar and click once on the shape:

Shape

Make sure that the option Show Bounding Box in the option bar is selected: Show Bounding Box

Move your mouse to one of the corner points (see red circle in image above), hold down the shift key and then push and hold the mouse button. Drag the corner inward until you're satisfied with the size of the shape. You can then move the shape in any direction after placing the mouse cursor inside the shape and holding down the mouse button. Repeat the whole process of resizing (while holding shift) and/or moving the shape until you're satisfied with the way it's aligned with the most important areas in your image:

Resized and moved shape

When you're done, double click inside the shape to finalize the transformation.

Open the Paths palette by clicking on its tab (A) and click on the Load path as a selection iconLoad Path(B) at the bottom of your paths palette:

Paths palette

Your path is now converted to a selection:

Path converted to a selection

Finally select in the menu Image / Crop to crop the image using the current selection:

Final image

So from now on you can crop any image using the rule of thirds using your custom path.

I hope that you enjoyed this tutorial.


(Thanks to Lunacore.com)
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