[Source Insight] Setting

1. Change TAB become Space
   
   • options->Document options -> Editing Option
     
     1. Expand tabs
     2. Tab width: 4
2. Visable TAB && Space
   
   • options->Document options -> Editing Option
     
     1. Visable TABs
     2. Visable Spaces
     
     
3. indent
   
   • View
     
     1. Drafe view

Reference :

1. sourceinsight使用技巧