"Tolerance" tab :

Allows to modify the values of the current border (displayed in red in the pre-visualization area).

"Reference" tab :

This tab sum up the status of the reference system, for each reference it's possible to set requirements (maximum or minimum matter).

The Insert and Delete button allows to change the reference tolerance. When you insert reference, if several references are selected they will be considered as common references.

The "Reference type" field allows to change the order of the reference.

"Comments" tab :

The comments area allows to add informations on the tolerancy, to control the text height which change the symbol height too.

"Control" tab: (Not available when you modify a 2d tolerancy)

This tab checks the consistency of the tolerancy, in the case of an inconsistent tolerancy, it will suggest you the modifications to apply.