At your leisure
Definition 1 of 1
Pro Tip 1/3Suggesting Patience
The phrase implies there's no rush and encourages a relaxed approach to an activity. 
Review the documents at your leisure, there's no deadline.
Pro Tip 2/3Casual Tone
It's often used in informal contexts or to create a friendly, unhurried atmosphere. 
Feel free to wander the gallery at your leisure.
Pro Tip 3/3Time Ownership
'At your leisure' conveys control over your time and the freedom to decide when to act. 
You can call me back at your leisure, no pressure.