merge.summary:: Whether to include summaries of merged commits in newly created merge commit messages. False by default. merge.tool:: Controls which merge resolution program is used by linkgit:git-mergetool[1]. Valid built-in values are: "kdiff3", "tkdiff", "meld", "xxdiff", "emerge", "vimdiff", "gvimdiff", and "opendiff". Any other value is treated is custom merge tool and there must be a corresponing mergetool..cmd option. merge.verbosity:: Controls the amount of output shown by the recursive merge strategy. Level 0 outputs nothing except a final error message if conflicts were detected. Level 1 outputs only conflicts, 2 outputs conflicts and file changes. Level 5 and above outputs debugging information. The default is level 2. Can be overridden by 'GIT_MERGE_VERBOSITY' environment variable. merge..name:: Defines a human readable name for a custom low-level merge driver. See linkgit:gitattributes[5] for details. merge..driver:: Defines the command that implements a custom low-level merge driver. See linkgit:gitattributes[5] for details. merge..recursive:: Names a low-level merge driver to be used when performing an internal merge between common ancestors. See linkgit:gitattributes[5] for details.