MacMost: Graphics

What Does a Photo's Pixels Per Inch Mean? (MacMost 2697)
5/2/22
Sometimes when you provide a photo to be printed or used in a publication, you will be asked about pixels per inch, or PPI. But PPI isn't really important. Only the number of pixels in the image matters, PPI is just a setting in the file.
Learn About Mac Image File Formats
3/1/22
When dealing with image files on your Mac, it is useful to know the difference between JPEG and GIF files, what HEIC or HEIF files are, what RAW means, and when to use a PNG file.
How To Remove a Photo Background With Preview
1/12/22
Here's how to remove the background from an image using the Preview app that comes with macOS. The Smart Lasso tool does a so-so job, but it is useful to know how to use it in case you only occasionally need to do this and don't wish to purchase another app to edit images.
How To Remove a Photo Background With Affinity Photo
1/11/22
Here's how to remove the background from an image using Affinity Photo. You can use this to blur the background or replace it.
How To Remove a Photo Background With Pixelmator Pro
1/10/22
The Mac app Pixelmator Pro has a variety of tools for removing the background of a photo. The best method is combining the Select Subject tool and then refining the selection with Quick Selection. You can use this to blur the background or replace it.
Using the New Convert Image Quick Action On a Mac
11/12/21
macOS Monterey includes a new Quick Action to convert images to other file types and resize them without launching an app.
Understanding and Creating Transparent Images On a Mac
8/27/21
Learn what makes an image transparent and how image pixels work. If you need to make the background or some portion of an image transparent to use it in a document, presentation or as a video overlay, here's how to do it in Pixelmator Pro or Affinity Photo.
How To Edit Images In Preview On a Mac
8/24/21
The Preview app can be used to view both image files and PDFs. You can also do quite a bit of editing on image files, such as color adjustments, cropping, copy and pasting selections, resizing, markup and exporting into another format.
How To Blur the Background Of a Photo On a Mac
7/7/21
There are many ways to blur the background of a photo. Here are two methods that use the third-party apps Pixelmator Pro and Affinity Photo, and then two methods using built-in Mac apps Preview and Keynote.
Is There a Paint App On The Mac?
3/19/21
Remember when Macs came with a basic Paint app? There hasn't been a default app like that for a long while, but you can use Preview and Photos for most things. If you want to be able to draw with pixels, however, you'll need a graphics app. Here are some suggestions, including one that is free and easy to use.
How To Cut Out Part Of an Image Using Affinity Photo
8/20/20
You can use the brush selection tool in Affinity Photo to cut out a subject in a photo. With the subject on a separate layer, you can apply adjustments, filters and effects to just the subject or the background. You can also copy and paste the subject onto another background image.
10 Inexpensive and Free Photoshop Alternatives For macOS
7/20/20

If you need to open PDF files or just want a decent image editing app that doesn't cost too much or require a subscription, there are plenty of options in the Mac App Store and elsewhere. All of these and 64-bit apps that work with macOS Catalina and beyond. See https://macmost.com/mac-photoshop-alternatives.html for links.

Create the Double Exposure Effect Without Photoshop
5/20/20
The double exposure effect is an interesting way to combine two ideas in the same image. You can create this by using tools like Photoshop. But on your Mac, there is also a way to do it using Apple's Keynote app. You can cut out an image using Instant Alpha and place another image in that space. You can then blend it with the original image.
12 Things You May Not Know You Can Do With Images In Mac Preview
2/24/20
Preview is a great tool for viewing image files. But you can do much more than just viewing. In addition to the annotation tools you may already be familiar with, you can also use Preview to export images into a different format, crop, resize and adjust colors. You can even import images from cameras or scanners.
How To Use the Mac Color Picker
2/18/20
The Mac Color Picker will appear when you want to choose a color in most Mac apps. You'll see it when you want to set the color of text, shapes, adjust images, draw, and many more places. There are several ways to choose colors and some of them are highly customizable.
Creating Circular Text On Your Mac With Acorn
1/15/20
If you need to draw text along a circular path on your Mac, you'll find you need a third-party app to do it. One general image editing app that will do it is Acorn, available in the Mac App Store at a much lower cost than anything from Adobe. You can easily add text outside or inside of a circle, and make adjustments to the text afterward. You can then export the result to use in any app.
How To Create Custom Folder And Drive Icons For Your Mac
1/13/20

You can create custom folder icons by using only the software that comes with your Mac. By taking the existing folder icon graphic and bringing it into Preview, you can tint the color and then add text, emoji or shapes to create a useful custom folder icon. Changing folder icons can be a little tricky and buggy, however. You can also use graphics apps to create more highly-customized icons and download icons online to use.

How To Convert JPEG Image Files To a PDF On Mac
11/26/19
If you want to convert a group of JPG image files to a single PDF, you can use a variety of methods. Most people will tell you to use Preview. But there are other ways that are either simpler or more versatile. You can use a Quick Action to do it without even opening up an app. You can also use Pages and Keynote to create richer PDFs with border, text and other features. The best way may be to use Photos which offers a variety of printing options that can be used to create PDFs.
Screen Capture Entire Web Pages On Your Mac
8/27/19
If you need to capture an entire web page as an image, it can be difficult to do so because macOS screenshots don't allow you to capture all of the contents of a scolling window. However, you can use many different techniques to get the entire contents of a web page. Safari has a hidden feature to do this, but sometimes it won't work on certain pages. You can buy third-party pro capture software that will let you take perfect screen grabs of entire pages. You can also use a feature of the free Firefox browser, though it sometimes doesn't work perfectly.
Change The Perspective Of A Photo
5/24/19
It isn't always possible to take a photo at the location and angle that you want. But you can straighten the photo afterwards on your Mac using most major image editing tools. Learn how to change the perspective and straighten a photo in Pixelmator, Acorn and Photoshop.