If automatic tool selection is enabled and you move the cursor over objects on the front panel or block diagram, LabVIEW automatically selects the corresponding tool from the Tools palette.
Toggle automatic tool selection by clicking the Automatic Tool Selection button in the Tools palette or by pressing the <Shift-Tab> keys. You can disable automatic tool selection by manually selecting a tool on the Tools palette or by pressing the <Tab> key to move to the next tool on the palette.