Visual InterDev 6 offers a quick way to convert tabs to spaces in your HTML code. Select the area of code in which you want to remove the tabs and then from the Edit menu, click Advanced, and then click Untabify Selection. Visual InterDev replaces the tab indent with four spaces. Likewise, you can turn spaces into a tab by using Tabify Selection from the same menu.Here are the keyboard commands:
Ctrl+Q Tabify SelectionCtrl+Shift+Q Untabify Selection