Is it possible to change the width of a combo box ?
If so, please explain how to change the width.
Try adding combobox from basic controls instead of advanced controls and apply CSS to the entire form.
I've added a document explaining the question more in detail.
I agree with Sandip as setting the css is the easiest way around this. Below is one possible solution.
1. Create a css file and add a rule that searches for any select tag with the "ApInptSelect" class and has a parent tag td. I set the width to 50px but change it to suit your needs.
2. Import the css to the project. This can be done from the Forms Editor and doing the following menu action.
3. Deploy the application