![]() JPEG and other ‘lossy’ file formats use clever psychological tricks to cut back on the amount of values an image needs to show its contents. The reason is that when we use full color images, we are, depending on the image, using 3 to 5 numbers to describe those values, with each of those values having a possibility to contain any of 256 values. Grayscale images, even when they have a lot of gradients variation, should be PNG. ![]() PNG does a lot better with images with sharp contrasts, while in some cases we can even have less than 256 colors, so GIF might be better. However, contrasts don’t do well in JPEG. JPEG is ideal for photos and images with a lot of gradients because it compresses differently. The logic is the way how each of these saves colors. This should use PNG, and if possible, in GIF. In the end, we want to have images that look nice and have a low filesize, because that makes the manual easier to download or browse on the internet. The appropriate file format for the job ¶ĭifferent file formats are better for certain types of images. The Screenshot hotkey on macOS is Shift + Command + 3, according to the official apple documentation. Like many screenrecording programs it does show trouble on Wayland. Peek – This one has an AppImage and a very easy user-interface. Furthermore, GIFs are quite nice to show off features with release notes.įor making short GIFs, you can use the following programs: While we should minimize the amount of GIFs in the manual for a variety of accessibility reasons, you sometimes still need to make GIFs and short videos. With imagemagick, you can use the following command: If, for whatever reason, you have no ImageMagick Linux ¶īoth Gnome and KDE have decent screenshot tools showing up by default when using the Print Screen key, as well do other popular desktop environments. On laptops you will sometimes need to use the Fn key. It is by default on the Print Screen key. ![]() Depending on your operating system, there are several screenshot utilities available. Now, if you wish to make an image of the screen with all the dockers and tools, then Saving For The Web won’t be very helpful: It only saves out the canvas contents, after all! In particular it deals with making images for the manual, and how to optimise images. This one is a little bit an extension to Saving For The Web. ![]()
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