Fill up

It fills a hole up by clicking an edge of a hole. Current material is assigned to the new face.

Original		The color of edges is changed when the mouse cursor is over one of them.		Fill a hole up by clicking (Polygon option is active in this picture)

You can select an option to fill up.

Center vertex ON	Triangulate ON
A vertex is put at the center.	Divide into triangles.

Bridge

It makes faces to connect two holes by clicking them.

The new faces are created in the current object, and the current material is assigned to them.

Original (Left: hole A, Right: hole B)		Edges around the hole A are highlighted when the mouse cursor is over them.		The hole A is selected by clicking.
Edges around the hole B are highlighted when the mouse cursor is over .		A dialog is opened and a preview of a bridge is shown after clicking a hole B.		A bridge is created after pushing the OK button.

After two holes are selected, the following dialog is opened.

Segment

It specifies the number of a division of a bridge.

Segment : 2	Segment : 10

Tension

It specifies a tension for a bridge. A larger value makes a more expanded shape.

Tension : 0.00	Tension : 0.50

Rotate

It rotates a bridge. When you click the left button or the right button, a pair of vertices between a bridge are switched.

No rotation	Rotate left once

A bridge can be made even if the shapes or size of holes are different from each other.