How to lock/unlock an element?
Step-by-Step Instructions:
1. To lock an element, simply click on the element you want to lock to highlight it.
2. Then, click the lock icon on the top-right corner of the page. This makes the element unselectable, and you will be unable to edit it or move its position. Note: You may repeat this for any number of elements.
3. To unlock all locked elements, first, unselect all items by clicking on the blank part of the canvas.
4. Then, the Unlock Objects button will appear along the top portion of the page. Click this button to unlock all locked elements.