Magit-tbdiff provides a Magit interface to git-tbdiff [1] and git-range-diff, subcommands for comparing two versions of a topic branch. There are three commands for creating range diffs: * `magit-tbdiff-ranges' is the most generic of the three commands. It reads two ranges that represent the two series to be compared. * `magit-tbdiff-revs' reads two revisions. From these (say, "A" and "B"), it constructs the two series as B..A and A..B. * `magit-tbdiff-revs-with-base' is like the previous command, but it also reads a base revision, constructing the range as ..A and ..B. These commands are available in the transient `magit-tbdiff', which in turn is available in the Magit diff transient, bound by default to "i" (for "interdiff" [2]). So, with the default keybindings, you can invoke the tbdiff transient with "di". As of v2.19.0, Git comes with the "range-diff" subcommand, an analog of tbdiff. The option `magit-tbdiff-subcommand' controls which subcommand is used. When Magit-tbdiff is installed from MELPA, no additional setup is needed beyond installing git-tbdiff [1]. The tbdiff transient will be added under the Magit diff transient, and Magit-tbdiff will be loaded the first time that the tbdiff transient is invoked. [1] https://github.com/trast/tbdiff [2] When I selected that key, I didn't know what an interdiff was and that what tbdiff refers to as an "interdiff" isn't technically one. Sorry. https://lore.kernel.org/git/nycvar.QRO.7.76.6.1805062155120.77@tvgsbejvaqbjf.bet/#t