The Width list box contains the following choices:

Absolute from top left

Absolute from bottom right

Proportional (default)

Fixed        

It is also possible to check or clear:

Snap        (default is cleared)

In a headline + 2 legs structure as this one (2 columns wide and 6 modules high):

tool_h2c_1

where TOOL attributes for the headline box are X=ATL, Y=ATL, W=PRO, H=FIX, and X and W (for each leg) are as shown in the examples, produce following results, when a frame od 3 columns wide and 6 modules high is used as the replacement target:

A/        first        second

X        ATL        ABR

W        ATL        ABR                

tool_h2c_1b

The headline width adapts to the target size (3 columns). The width of the legs remain unchanged, but they right leg moves following the width of the headline. A gap is created between legs. If the replacement target would be 4 columns wide, the gap would be 2 columns wide.

B/        first        second

X        ATL        ATL

W        ATL        ABR

tool_h2c_1a

The headline width adapts to the target size (3 columns). The width of the first leg remains unchanged, but the right leg widens following the width of the headline. No gap is created between legs. If the replacement target would be 4 columns wide, the 2nd leg would be 3 columns wide.

C/        first        second

X        ATL        ATL

W        ABR        ABR

tool_h2c_1c

The headline width adapts to the target size (3 columns). The width of the first leg follows the width of the headline, and the right leg remains unchanged. No gap is created between legs. If the replacement target would be 4 columns wide, the 1nd leg would be 3 columns wide.

D/        first        second

X        ATL        PRO

W        PRO        PRO

tool_h2c_1d

The headline width adapts to the target size (3 columns). The width of the both legs follows the width of the headline, proportionally. Anyhow, the gutter between legs is wider than the column gutter. If the replacement target would be 4 columns wide, both legs would be 2 columns wide.

E/        first        second

X        ATL        FIX

W        FIX        FIX

tool_h2c_1e

The headline width adapts to the target size (3 columns). The width of the both legs remains unchanged, as their position.