Issue: Unable to expand boxes after placing them. Sometimes happens in Xcode 8.0 or higher
Cause: Working on Xcode remotely has some limitations, Xcode does not recognize certain key combinations that are sent remotely, such as being able to click and adjust the box sizes.
By selecting the Size Inspector tool you will be able to adjust the exact coordinates of the selected item and can easily adjust its size.
You can see the changes made by adjusting the Width and Height of the box and changing the X and Y coordinates.
You can also auto-align it to the center using the Arrange tool. You can align by the center of the screen (vertically and horizontally).