...
To make best use of screen real estate, resize the GAMBIT and browser windows so that you approximate this screen arrangement. This way you can read instructions in the browser window and implement them in GAMBIT.
The mesh from the previous tutorial should be displayed. To fit the mesh to the size of the window, select:
Global Control > Fit to WindowWindow
Delete Previous Face Mesh
The first step we have to do is remove the old face mesh. Recall that the face mesh is built on top of meshed edges, thereby forming the grid. In this case, we don't want to remove the underlying edge meshes. So to delete only the face mesh, select:
Operation Toolpad > Mesh Command Button > Face Command Button > Delete Face Meshes
Since we only have one face, shift-click any edge of the bounding rectangle to select the face mesh we want to delete. The face you have selected should become red and the name of the face listed in the Delete Face Meshes window in the drop down box.
...