git difftool打开mergetool View

Question

我的.gitconfig有：

...
[merge]
    tool = BeyondCompare4
[diff]
    guitool = beyondcompare4
[difftool "beyondcompare4"]
    path = C:/Program Files/Beyond Compare 4/bcomp.exe
    cmd = \"C:/Program Files/Beyond Compare 4/bcomp.exe\" \"$LOCAL\" \"$REMOTE\"
[mergetool "BeyondCompare4"]
    path = C:/Program Files/Beyond Compare 4/bcomp.exe
    cmd = \"C:/Program Files/Beyond Compare 4/bcomp.exe\" \"$LOCAL\" \"$REMOTE\" \"$BASE\" \"$MERGED\"

但是，每当我运行git difftool ...时，调用带有4个参数的git mergetool ...命令，我就会得到3向合并视图而不是并排视图。

使用git difftool时如何获得并排视图？

注意：我使用GitExtensions设置配置文件。