After selecting an asset, you'll be presented with a few options: select, move, rotate and resize.
While these options may seem very intuitive, it's easy to miss this white box underneath the assets:
Select an asset you want to resize and choose the 4th option (resize button). You'll be presented with four boxes:
- Green: to stretch your asset vertically
- Blue: to stretch your asset's depth
- Red: to stretch your asset horizontally
- White: perhaps the most important box, this one allows you to resize your assets evenly.