How can I disable (or hide) this part in IntelliJ idea ?
Go to File -> Settings -> Editor -> General -> Code FoldingUncheck Show code folding outline.
Start typing a name. By default, IntelliJ IDEA displays the code completion popup automatically as you type. If automatic completion is disabled, press Ctrl+Space or choose Code | Code Completion | Basic from the main menu. If necessary, press Ctrl+Space for the second time (or press Ctrl+Alt+Space ).
In Preferences > Editor > Code style > [language] uncheck reformat on file save .
For IntelliJ 15+ with default keyboard bindings
Press cmd+shift+A on a mac or ctrl+shift+A on windows, to search for an action, and type code folding. This pops up a menu with an option of 'Show code folding outline' and on the right of it is an off/on switch. You can change this with enter or just click on it.
The settings dialog is old-hat these days.
Go to File -> Settings -> Editor -> General -> Code Folding
Uncheck Show code folding outline.
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