Hot answers tagged

82

Using fast bucket fill instead of contour selection Note: This tutorial is also available in PDF. Add an alpha channel Some image types lack a transparency channel; JPG for example. If this is the case, add an alpha transparency channel. This is done by selecting Layer → Tranparency → Add Alpha Channel. Bucket fill with colour [optional] The next step ...


80

If you imported a GIF file into GIMP, your problem is that your image is in indexed mode. In this mode, most filters and color tools won't work, and be grayed out (up to GIMP 2.8 - expect news on this front on GIMP 2.10). So, all you have to do there is to go to Image->Mode->RGB, and the Color to alpha menu entry will be enabled. I don't think that ...


75

Are you sure you're clicking on the actual letters in the text? When selecting a layer to move, GIMP will pick the uppermost layer which is non-transparent1 at the point you clicked, ignoring any transparent layers that might be on top of it. What this means is that, using the "Pick a layer or guide" mode of the move tool, you can only drag a layer around ...


75

Looks like your move tool is in 'Move selection' mode. Check the Move setting in the tool options (this image is from the docs and shows Move layer mode): The Alt key toggles to the 'Move selection' mode (Ctrl does the same for 'Move path'), and is supposed to switch back to 'Move layer' once you let go of the key. If you manage to steal the input focus ...


58

We can easily slice an image to subimages along predefined guides using the Guillotine tool: Define Image > Guides > New Guides (by Percent) at 25% 50% 75% horizontal and vertical resp. Apply Image > Slice using Guides (in Gimp 2.8. Image > Transform > Guillotine) to slice into subimages: To export the images in ready to use HTML code we can alternatively ...


55

To answer your literal question, there are a few areas where GIMP can be better than Photoshop. It's not particularly common (usually, at best you can expect them to do the job equally well), but it does happen. Off the top of my head (and keeping in mind that it's been many years since I last used Photoshop), here are a few examples: As a historical ...


54

It's not possible. The only thing you can do is link layers together or merge them. How to link layers information here. Instead, there are several alternative methods of handling multiple layers, each appropriate to a different task. You can chain layers to move or transform them, shift-click objects on different layers in the canvas to align them, or ...


52

Before I start, just to let you know I'm a happy and frequent user of GIMP, but I also have an Adobe CC account, and use the latest version of Photoshop, which I also enjoy using. I'm not a fanboy of anything. GIMP is not Photoshop, and it doesn't really try to compete with Photoshop. It's not commercially developed, and so it's not a commercial competitor,...


41

OK, so I assume you have two images: a normal image that you want to add transparency to, and a grayscale image that you want to use as its alpha (transparency) channel, something like these: (Base image based on this photo by John Fielding, used under the CC-By-SA 2.0 license; alpha mask created by me using the GIMP's Sphere Designer tool.) There are ...


41

Whenever we choose to change a color to transparent with the Layer > Transparency> Color to alpha tool we will also introduce semi-transparency of colors different to the selected. Below this is shown for making white in the background transparent: In case this is not wanted we need to select only a single colored area for transparency. This can be done ...


29

Your move tool is set to move the selection, not the area selected by. You should: Transform your selection to a float selection using Select->Float In the move tool options choose to move Layer instead to Selection (by pressing the first icon near "Mover" in "Opciones de herramienta") Now, it should be possible to move the shine.


25

You could use the "difference" layer mode to create a layer mask, and apply it to B like this: Open both images as layers, A on the bottom, B on top On the layer's dialog, mark B's layer mode as "difference". You now should see the image mostly black is the images are alike, with the colored areas marking the areas that are different. These colors, however, ...


23

I was looking for an answer to this, which is why I came upon this question. The closest solution I could find is this: Click on the top ruler and drag down a guide to the Y coordinate you want. Click on the left ruler and drag right a guide to the X coordinate you want. Use the move tool to drag the layer to the approximate position you want it. It will ...


23

When you paste something into GIMP, it becomes a floating selection. That's a sort of a temporary pseudo-layer that contains the pasted content and allows you to move it around (and edit it in other ways) before actually merging it into the target image. However, having a floating selection active also prevents you from making any edits to anything but the ...


23

I had been having this problem FOREVER and I just found a solution, even though the person I was talking to about the move tool made me actually figure out the problem. The alignment tool is selecting the top most layer where ever you click, regardless of what layer you have selected/transparencies. Try hiding the layers above what you are trying to work ...


23

This is for GIMP Start with something like an A5 canvas size Create a new brush like this Create a new Paint Dynamic preset, and set the matrix as follows Increase the size of the brush as you like, and paint random coloured lines, choosing different colours, on a new transparent layer above a black background layer. Continue until you've built up enough ...


21

If you want to resize the contents as well (layers, paths...) see Image>Scale image. If you want to just reduce the canvas size, see Image>Canvas size. If you have a 16x16 layer in the middle of large canvas, Image>Fit canvas to layers can also be a solution.


21

Well- this is more of an answer that I wanted to post- but was unable to. This is how you do it- Open the image in GIMP. In the Layers window, right click and select "Add Alpha Channel" From the Colors drop-down menu- select "Color to Alpha" Done- the pop up asks you the preset color, click OK and your image can be saved now as png with transparent ...


20

This can be achieved by clicking "Colors" --> "Colorify..." (Not "Colorize...") That brings up a dialog box. Click the color box next to "Custom color:" to enter HSV, RGB, Hex, or use a color picker. Documentation for "Colorify" is available here: http://docs.gimp.org/en/plug-in-colorify.html


20

There is a plugin: Download arrow.scm and save it to /home/username/.gimp-2.8/scripts (on a Linux system). For example: cd ~/.gimp-2.8/scripts wget https://web.archive.org/web/20160708211721/http://registry.gimp.org/files/arrow.scm Check your version numbers, naturally. Next time you start up Gimp, you should see an Arrow option under the Tools menu. ...


19

You could also convert the transparency into a layer mask using Layer → Mask → Add Layer Mask... and selecting the "Transfer layer's alpha channel" option. This will let you edit the color and transparency components of the layer independently. In particular, to recolor an object, you can just select a region around it and fill it with a solid color.


19

With Gimp comes a plugin Resynthesize together with a Python script Heal Selection. On Linux the plugin is contained in the package gimp-plugin-registry. After selecting an area with the select tool: We can "heal" this selection from "Filters > Enhance > Heal selection...". Here I made a random healing with 10 pixels from the surrounding:


19

Copy&paste is the wrong approach to copy layers from one image to another - this will only transfer the layer content, and as you have discovered that isn't the same as a layer or group of layers. Instead, drag the layer or layer group from the layers dialog of the source image to an image window of the target image. This will keep them intact, ...


18

If you have control over the scanning, or can get them rescanned, increase the contrast setting in the scan and set the black point at the darkest bit of text you can find. That would make the steps below easier. If not, read on... Here's part of a fairly typical old document scan: The details will be different depending on the document (this has somewhat ...


18

In the tool options for the eraser: Select the first brush (pixel). Select a size of 1. Select hard edge. Set Dynamics to Dynamics off Then the eraser should do what you want. (Also, do not forget that you need an alpha channel on the respective layer.)


17

You can (from 2.8 on) make use of layer groups to get most of the functionality you might want: http://docs.gimp.org/en/gimp-layer-groups.html From the GIMP docs: You can create a layer group either by Clicking on the Create a new layer group button at the bottom of the layer dialog (looks like a folder icon) Through Layer → New Layer Group, or Through ...


17

To be sure.. Convert it to a real layer Activate the move-tool Choose "Move the active layer" in the settings panel for your tool Activate/select your layer Click once on the canvas Depending on circumstances, you could skip different or all steps. But if done correctly, you should now be able to move your layer with your mouse or the arrow keys! EDIT: If ...


16

There are at least two ways to crop your image. (1) First select the region of the image you want to have, by using the... Rectangle Select Tool (R) to make a rectangular selection Ellipse Select Tool (E) to make an elliptical selection Free Select Tool (F) to make a hand-drawn selection Fuzzy Select Tool (U) to make a color-based contiguous selection (...


16

Here's the answer you're most likely looking for: Scenario: say in GIMP you have a logo image, you increase the Canvas, center the logo inside the enlarged canvas, and you want to fill the extra canvas with an eye-dropper color. However, the paint bucket shows a black circle with line through it indicating no-can-do. Do this: from menu, select "Layer", ...


15

To crop a layer: Double-click the "Crop Tool" in the Toolbox. In the Crop Tool's "Tool Options" dialog, check the checkbox next to "Current Layer Only". Note: By selecting this box, all future use of the crop tool will only apply to the current layer. You must open this dialog again and uncheck the checkbox to crop the image again.


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