3-way diff window

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How to open 3-way diff window manually? I found quite a lot of issues in YT mentioning it but they seem to reference merging in git. It would be nice to have option to open 3-way diff window and paste content. Currently opening "Diff & Merge" opens typical two-pane window.

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3-way diff opens only for conflicts, there is no way to open blank 3-way merge with editable panes.

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Would you consider it as a feature-request?

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You are welcome to submit one to https://youtrack.jetbrains.com/issues/IDEA 

Make sure to describe the use case you want to solve with the feature, as in fact, it is not immediately clear what exactly you want to merge this way, and why this might be useful to merge arbitrary contents via 3-way view.

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Added https://youtrack.jetbrains.com/issue/IDEA-228934

 

Motivation? It's about *diff* and not *merge*. Why? To easily compare 3 things - in my case it was 3 similar payloads that github generated to webhook when doing release and I wanted to easily compare them because one used undocumented action so when creating handler I wanted to know what exactly is different in every of the payloads sent.

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