The menus for all buttons and cell entries are activated by right clicking
Cells (tableau entries)
Pivot on Entry - performs an integer pivot on the cell;
this entry becomes the basic coefficient for the resulting tableau.
Highlight Entry - changes the background color of the cell
for emphasis; useful for classroom discussions (highlight all basic
coefficients, potential pivot entries, etc.).
Add Row and Column After - adds a new row and new column
after this cell; useful for adding new constraints (such as
cutting planes, for example).
Delete Row and Column - deletes this row and column.
Make Entry 0 - enters 0 in cell (actually easier to simply
Make Entry 1 - enters 1 in cell (actually easier to simply