The uibuilder settings are in the attachment. What I expect is that the icon and the textField are seamlessly next to each other. But at runtime , there is always a gap. Their border widths are both 0.

The uibuilder settings are in the attachment. What I expect is that the icon and the textField are seamlessly next to each other. But at runtime , there is always a gap. Their border widths are both 0.
Maybe the gap comes from margin & padding
They are all zero. I’ve checked
With the UI toolkit debugger, you should be able to find which element causes the issue
emm, good idea