How to resize a digital photograph using Acorn software

=== by Bob Sutherland ===

A lesson on how to resize a digital photograph using Acorn by Flying Meat Inc. for Macintosh computers.

Acorn is a photo editing program that you can download and purchase on the Internet from the computer programmer's website:
https://flyingmeat.com/acorn/

The following are screenshot images I captured of my computer screen as I worked through the process of resizing a digital photograph.


Acorn application icon
This is what the Acorn application icon looks like.

The first step is to start up the Acorn application and open a file that contains a photograph. There are many different ways you can accomplish this task.

You may find the Acorn.app icon in the Dock at the bottom or side of your screen. You should find the Acorn.app among all your application icons displayed by the Launchpad. Alternatively you can look for the Acorn program in the Applications folder on your hard disk.

Screenshot
Here is the Welcome to Acorn window I saw after starting up the program. I mouse clicked on Open an Image.

An alternative method would be to go up to the Acorn application menu I can see along the top edge of my screen. In the File menu there is the Open command to open image files.

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This window allowed me to search through all of the folders and files on my computer. I found and opened the photograph I want to resize.
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Here is my photograph partially hidden behind the Tools and Inspector windows. It is a picture of the backyard behind an old house.
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In the Windows menu at the top of the screen I removed the checkmarks from Tools and Inspector. The Tools and Inspector windows are taking up a lot of space on the screen and do not appear to be helpful for the task of resizing a photograph. Those checkmarks are called toggle switches and can be turned on and off by mouse clicking on them.
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Here is my photograph that was automatically zoomed smaller by the Acorn application to fit on the screen. The bottom edge of the screen shows the size of my photograph measured in pixels. It is now being displayed at 26% of its full size.
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In the Image menu at the top of the screen I found two commands: Resize Image and Resize Canvas.
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Here is the Resize Canvas window. Seeing that box of 9 squares in a 3 by 3 grid alerts me that this is a method to crop images to precise pixel measurements. That is not what I want to do in this lesson so I mouse clicked on the Cancel button.
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Here is the Resize Image window. Notice that there is a checkmark in front of Keep aspect ratio. That is a hint that we have found the right command and window to proportionally resize our photograph smaller without changing its shape.
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When doing some research I found that 1024 pixels along the longest edge is often recommended as a good size for photographs that will be displayed on computer screens or the Internet. ( Computers love photograph dimensions that are multiples of eight. 1024 = 8 x 8 x 8 x 2 )

Since Width is the longest side I have changed it to 1024 pixels. The Acorn application automatically changes the Height measurement.

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Oh no my photograph has shrunk! Which is exactly what I wanted it to do but it is still being displayed at 26% zoom.
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In the View menu I can change the Zoom To for the window display size of the photograph.
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My computer screen is just large enough that I can display the photograph at Actual Size which means 100%. Your computer screen is probably a different size than the one I used to create theses screenshots.
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The final step of this lesson is to save our resized photograph with a new filename so that it does not erase the original file. In the File menu there appears to be a few different options I can try including Save As and Export.
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Here is the window that is displayed by File menu > Export > Web Export. Hey it may have been possible to skip most of this lesson of screenshots and go straight to this window to resize my photograph as I exported it into a JPEG file. Notice that you cannot save the file using the TIFF file format.
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Here is the window that is displayed by File menu > Export > Export. I have renamed my photograph file by adding 1024 to the filename.
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Here is a list of the file types I can use for saving my photograph file if I use File menu > Export > Export.
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Here is the window that is displayed by File menu > Save As.
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Here is a list of the file types I can use for saving my photograph file if I use File menu > Save As.
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Here is the final screenshot of this lesson. It shows the pixel dimensions of my original photograph file and the pixel dimensions of my resized photograph file after using the Acorn application.