Clarification about merging branches (local) verse TortoiseGit

[ChuckieAJ]

I am not a Git Guru by anymeans but up until now I have been using TortoiseGit. I continue to do so on occasion.

But I wanted to be clear about merging branches. In TortoiseGit I right-click and choose the option to Merge and this popup is displayed:

I always tick the No Fast Forward option and leave the Merge Message as the default. When I check the TortoiseGit log afterwards I can see the merged branch:

I can now check in SourceTree and it looks the same (as you would exspect):

Now, lets just go back to the point before I hard merged the branch. This si what it looked like in SourceTree:

When I right-click the branch and choose the option to merge it, the following is displayed:

This is why I stopped and ended up using TortoiseGit to merge. How do I ensure it will merge in the same way (no fast forward)? I ask because sometimes in the past I merged and did not have that option ticked and it merged as a single commit, which I did not want.