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Enable tabs - View > Show Tab Bar
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Double click on file in project view and open in new tab - Xcode > Preferences > Navigation > Double Click Navigation > 'Uses Separate Tab'
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Increase the font size - Close all projects > Xcode > Preferences > Fonts & Colors > Choose your theme in the left column > Click on 'Plain Text', Cmd + A to select all > Click on the little 'T' icon on the bottom right font picker > Change font size
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Install plugin manager - See http://alcatraz.io/
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Allow increase/decrease font size easily - Install
AdjustFontSize
plugin -
Edit a variable across an entire file - Ctrl + Cmd + E (Edit all in Scope)
- Change behavior of word navigation to respect symbols -> ./?(){}[]\ etc.