Today I was looking for changes in a certain file, say https://gitlab.com/gitlab-org/gitlab-ce/blob/master/app/views/projects/tree/_tree_content.html.haml for example. Now I was looking for certain changes within the file of previous commits. Currently we got either [blame](https://gitlab.com/gitlab-org/gitlab-ce/blame/master/app/views/projects/tree/_tree_content.html.haml) or [history](https://gitlab.com/gitlab-org/gitlab-ce/commits/master/app/views/projects/tree/_tree_content.html.haml) for that. However these functions/views are not interactive enough.. Say if we look at blame, we can see for each line what the latest commit was.. however what if I want to go back more than 1 commit? Say if we look at history, we want to have to click and inspect each view individually before we can see any result. ### Proposal I would like to integrate the history view into the file view itself, by a scrobble slider (like you would scrobble through a song in a music player) in order to move its view back in time, taking steps per commit that changed it. for the git blame view i would do the same, however this would have the added benefit to switch to previous commits per line of code. #### early mockups to give an impression  cc: @JobV @victorwu @awhildy @annabeldunstone