Using tab to switch value field in a same interface area

Is anyone knows if there is a quick way (keyboard shortcut ) to switch to the next value field to enter value instead of clicking and entering?

A frequent case for me: I want to change the instrument number: I click on the “Src. instr.”, enter my value and then I have the reflex to hit TAB to switch to “Dest instr” but it only do a tab (space) in the current field instead of switching to the next field. Any tips to share guys?

tabing.jpg

Thanks,