If form elements are inserted into a document, LibreOffice automatically determines in which order to move from one control to the next when using the Tab key. Every new control added is automatically placed at the end of this series. In the Tab Order dialogue, you can adapt the order of this series to your individual needs.
You can also define the index of a control through its specific properties by entering the desired value under Order in the Properties dialogue of the control.
A radio button inside a group can only be accessed by the Tab key when one of the radio buttons is set to "selected". If you have designed a group of radio buttons where no button is set to "selected", then the user will not be able to access the group or any of the radio buttons by keyboard.
Lists all controls in the form. These controls can be selected with the tab key in the given order from top to bottom. Select a control from the Controls list to assign the desired position in the tab order.
Click the Move Up button to shift the selected control one position higher in the tab order.
Click the Move Down button to shift the selected control one position lower in the tab order.
Click the Automatic Sort button to automatically sort the controls according to their position in the document.