Hi zou,
Sorry for the tardy reply.
We are investigating this behavior further. You are able to resize the objects in the Simple OI in LabVIEW 7.1, but are unable to do so in LabVIEW 8.X. As a workaround, you can use one of the following methods:
1) Create a new control (all new controls are resizable) and delete the old control. You could then reconnect the new control
2) Replace the old control with the same control. This will automatically reconnect the control for you on the block diagram.
3) Customize the control by right-clicking on the control and select Advanced >> Customize. You can then resize the control.
As I said, we are investigating this further and when I have more information, I will let you know.
Matt M
NI