i3-gaps is included in i3 v4.22, which is available in many Linux distributions already. You can find the release notes at https://i3wm.org/downloads/RELEASE-N

i3-gaps is included in i3 v4.22, which is available in many Linux distributions already. You can find the release notes at https://i3wm.org/downloads/RELEASE-NOTES-4.22.txt https://i3wm.org/downloads/RELEASE-NOTES-4.22.txt Documentation for the gaps feature is at https://i3wm.org/docs/userguide.html#gaps https://i3wm.org/docs/userguide.html#gaps