ArcGIS Fill Editing Tool

Is there a way to fill while editing in ArcGIS?

You know similar to the popular paint tool, where an enclosed area is filled with a colour. I'd like to fill an enclosed area (enclosed by poly lines or polygons or both).

I'd like to be able to do this in an edit session, a batch process or tool would not provide the functionality that I am looking for.

Here is an image to better explain the situation:

I need to fill the area between the High Water Mark (the dark blue polyline) and the lake (the blue polygon). I've highlighted the area I need to fill with a red scratch. Now there is a lot of gaps and inaccuracies in the data, so I need to manually check each one as I do it. It takes forever to trace first the watermark and the lake. I don't see why there isn't an ArcGIS editing tool to fill in gaps. If Microsoft can create one anyone can.

Answer

You can use Advanced Editing toolbar with Construct Polygons tool for that (available to ArcGIS for Desktop Standard and ArcGIS for Desktop Advanced only).

On the picture to the right, the selected lines that form a triangle are used for constructing a polygon yet an existing large polygon is taken into account and just two small triangles are created. It is important to make sure the lines are closed, otherwise you cannot generate polygons. In case they don't and you have many features to go through, you might consider using Integrate GP tool to "snap" closely located vertices of lines to form closed geometries.