Hey Dean

Thank you for posting in the Lucid Community! To change the height of your swimlane you can adjust it from the bottom and drag it down. As for your shapes staying in their lane you will want to ensure that our "magnetize" feature is active. This will ensure that all of your shapes stay in their lane as you move your swimlanes around the canvas.

Hope this helps--please reach out again if you have any other questions!

Resize it after using the magnetize button.