Clicking 
in the Bracket dialog opens the dialog, where you can define a new bracket type.
You can select the following brackets:
- Plates of determined dimensions
- An appropriately cut section for a given bar.
When you select the type of bracket, specify the following parameters:
- Bracket dimensions (absolute or relative values, with respect to section dimensions),
- Bracket type (upper, lower, or at both sides).
A bracket defined this way can be saved under a label you choose. Later, you can use this bracket many times in a structure. Brackets of a bar are introduced separately for each bar end.
Note: A bracket defined through relative values is automatically adjusted to the bar and the section. Therefore changing the section during design, changes the bracket dimensions that depend on the section dimensions.