1. Select the Agents you want to disallow, then click "Add Agent" (hold down the ctrl button on your keyboard to select more than one).
2. Type in the directories or pages you DON'T want indexed, into the input area. For example:
Click "Add Directive". Repeat this as needed, until all pages for this Agent (or all Agents, if you chose that) have been added.
3. Repeat 1 and 2 as needed.
4. Once finished, click "Copy" to copy the code.
5. Create a file call robots.txt. Paste what you have just copied into this.
6. Upload robots.txt to the ROOT directory of your site.