build message error tree view message text display offset
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How can I change the build message output to display as close to a console output display format?
The problem in the message view, is the caret is pointing to a incorrect position to the above text, as compared to console output.
The output come from an external builder application, and is stored to a CompilerMessage object.
(Note: This is developed for both plugin and SDK.)

The content copied from the message window (pic top) to a text editor (pic bottom), and from debugging until NewErrorTreeRenderer class, shows the original text content are un-modified.
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Build tool window uses UI font, that's why the characters do not line up vertically. Unfortunately, it's not possible to change font specifically for this tool window.
Do you also mean this cannot be overridden, unless I create my own panel?
Yes. You may file a feature request to make font customizable in our issue tracker https://youtrack.jetbrains.com/issues/IDEA
Thanks. Feature request: https://youtrack.jetbrains.com/issue/IDEA-254630