If your profile is active, you'll be available for position matching. If you'd like to "pause" your profile, and not be matched to any positions for a while, visit the "Availability" section of your Profile:
Here, you'll see the following box:
Selecting one of the options will prevent your profile from being matched to positions. Once that time period has passed, we'll send you an email to see if you're ready to get back in the market.