<li>Open up preferences<b>Preferences</b>. On mac it's simply <b>Command+, </b> (literally just hold command and the comma key) and on PC, well hopefully someone can edit to confirm but I imagine it's along the lines of <b>control+p.</b></li> <li>Click on the arrow beside <b>Editor </b> to bring down the further categories for it.</li> <li>Select <b>Indentation.</b></li> <li>Simply enter the <b>desired number of spaces for indents in the appropriate window and hit OK </b> at the bottom.</li>