Options for adding different end shapes of Main rebar:
These options can be used only after Main rebar layout has been defined.
Row position and Rebar bar type - these columns come from the Layout tab and show all rebar defined there.
Then for selected rebar you can define the ending option:
Straight - simple start/end offsets of main bars will be used as they are defined in the Layout tab.
Type 1 and Type 2 - see pictures and parameters in next columns to define their shape.
Side - define at which end of the beam selected rebar shape should be applied