Select the Editor icon along the top of the window.
Select the Formatting tab. This is where the global tab options are located. However, if you are programming in C, the C language-specific settings by default will override any selection made here.
Continue to the next step if you are programming in C.
Immediately under the Formatting tab, select C in the Language pull-down box
Tab settings for C language files are found under the Indents category in the properties grid on the lower left of the window. You may instead choose to uncheck the Override Global Options box to force C to use the global options under All Languages.
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