{"id":70,"date":"2025-04-28T09:17:12","date_gmt":"2025-04-28T07:17:12","guid":{"rendered":"https:\/\/linuxundich.de\/en\/?p=70"},"modified":"2026-10-03T21:49:47","modified_gmt":"2026-10-03T19:49:47","slug":"creating-a-magnifier-effect-for-screenshots-with-gimp","status":"publish","type":"post","link":"https:\/\/linuxundich.de\/en\/gnu-linux\/creating-a-magnifier-effect-for-screenshots-with-gimp\/","title":{"rendered":"Creating a Magnifier Effect for Screenshots with GIMP"},"content":{"rendered":"\n

When I write articles regularly or share content on platforms, taking screenshots is an essential part of my work. Desktop environments like KDE and GNOME already ship with good screenshot tools. KDE has the very solid Spectacle<\/em>, for example, and GNOME offers a basic solution with its screenshot tool. Still, I often miss features for editing a shot afterward. Especially when I want to add notes, arrows or highlights, I can’t avoid reaching for additional tools or an image editor like GIMP<\/a>.<\/p>\n\n\n\n

I used to use Shutter<\/a> for this. Unfortunately, it has since lost its Wayland support and hasn’t seen any development for quite some time. As my current alternative, I use KSnip<\/a> to add notes and markings, even if that means pulling a pile of Qt libraries onto my system. What I’m still missing, though, is a magnifier effect that lets me enlarge small details in my screenshots and call them out.<\/p>\n\n\n\n

\"KSnip\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
KSnip makes it quick to add notes and markings to screenshots. A magnifier effect to highlight details, however, is not available.<\/figcaption><\/figure>\n\n\n\n

You can do this effect quickly and easily in GIMP, though, even if there is no dedicated filter for it. In this guide, I’ll show you how to create a magnifier effect on your screenshots in just a few minutes.<\/p>\n\n\n\n

Step-by-step guide to the magnifier effect in GIMP<\/h3>\n\n\n\n

Open the screenshot<\/h4>\n\n\n\n

First, open your screenshot in GIMP. If you haven’t taken a screenshot yet, you can do that right in GIMP: in the menu, choose File<\/em> \u00bb Create<\/em> \u00bb Screenshot<\/em>. There you can either capture the screenshot directly in the program or import an earlier one.<\/p>\n\n\n\n

Select the area<\/h4>\n\n\n\n

Now pick the Rectangle Select<\/em> tool or the Ellipse Select<\/em> tool from the toolbox on the left. Drag the selection around the area you want to enlarge, that is, the area you later want to highlight with the magnifier effect. To create a circular selection with the ellipse tool, hold down the Shift key while dragging with the mouse.<\/p>\n\n\n\n

Once the selection is made, press Ctrl<\/kbd>+C<\/kbd> on the keyboard to copy the area. Then press Ctrl<\/kbd>+V<\/kbd> to paste it as a new floating selection. This new selection shows up in the upper right area of GIMP as Floating Selection<\/em>. Right-click it and choose To New Layer<\/em> to turn the floating selection into a regular layer named Transformation<\/em>.<\/p>\n\n\n\n

\"Select\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
Select the area for the magnifier effect and copy it to a new layer. This is the basis for the enlargement effect later on.<\/figcaption><\/figure>\n\n\n\n

Enlarge the selection<\/h4>\n\n\n\n

Now comes the actual magnifier effect: choose the Scale<\/em> tool from the toolbox on the left and click the new layer you just created. Enlarge it until it gives you the \u201cmagnifying glass\u201d look you want. Make sure to lock the aspect ratio so the proportions of the selection stay intact.<\/p>\n\n\n\n

\"Enlarge\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
Enlarge the selected area to get the magnifier effect you want. Make sure to keep the aspect ratio of the selection.<\/figcaption><\/figure>\n\n\n\n

Fit the layer to the image size<\/h4>\n\n\n\n

Right-click the new layer in the right panel and choose Layer to Image Size<\/em>. This fits the layer to the overall image size without changing any of the other elements in the screenshot.<\/p>\n\n\n\n

Add a selection around the effect<\/h4>\n\n\n\n

Right-click the layer in the right panel again, and this time choose Alpha to Selection<\/em>. This makes the non-transparent area of the layer selectable.<\/p>\n\n\n\n

Add an outline<\/h4>\n\n\n\n

Now go to Edit<\/em> \u00bb Stroke Selection \u2026<\/em> and adjust the properties of the outline. Here you can pick the color and the thickness of the line. The default color is taken from GIMP’s foreground color. Unfortunately, there is no preview for this function. Click OK<\/em> to apply the outline.<\/p>\n\n\n\n

\"Add\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
Add an outline around the enlarged area to make it stand out better. This gives you a clear separation from the background.<\/figcaption><\/figure>\n\n\n\n

Adjust the background<\/h4>\n\n\n\n

Last but not least, you can apply a filter to the background to strengthen the effect further. A blur or a shadow on the new layer helps the magnifier effect come into its own. To do that, pick Filters<\/em> and try out different options, such as Blur<\/em> or Drop Shadow<\/em>.<\/p>\n\n\n\n

\"Strengthen\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
Strengthen the magnifier effect with blur or a drop shadow. These effects help the focused area stand out more.<\/figcaption><\/figure>\n\n\n\n

With these simple steps, you’ve created an effective magnifier effect in GIMP. It takes a bit of practice and fine-tuning, but after a few tries you’ll get a good feel for the tools and can work them efficiently into your screenshot editing. Especially handy: you can use the method on any part of an image, to highlight not just text but any other detail in your screenshots.<\/p>\n\n\n\n

\"Before:\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
Before: screenshot without the magnifier effect. Details and smaller areas are harder to make out without it.<\/figcaption><\/figure>\n\n\n\n
\"After:\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button>
After: details and smaller areas are now clearly highlighted, which makes them easier to see.<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

With GIMP, you can apply a magnifier effect to screenshots to highlight important details. This guide shows step by step how to create the effect quickly and easily.<\/p>\n","protected":false},"author":2,"featured_media":69,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"lui_source_id":44533,"lui_source_hash":"8e47ec9981a513db2bccb2104699daec31b616c02bc8fe9c85b7d502c544abe1","lui_source_translated":"2026-10-03","lui_source_reviewed":true,"lui_via_url":"","lui_via_label":"","lui_source_url":"","lui_source_label":"","footnotes":""},"categories":[2],"tags":[],"class_list":["post-70","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gnu-linux"],"_links":{"self":[{"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/posts\/70","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/comments?post=70"}],"version-history":[{"count":1,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/posts\/70\/revisions"}],"predecessor-version":[{"id":76,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/posts\/70\/revisions\/76"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/media\/69"}],"wp:attachment":[{"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/media?parent=70"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/categories?post=70"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxundich.de\/en\/wp-json\/wp\/v2\/tags?post=70"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}