In some cases (for
example the expression
) the user is allowed to specify an item (matrix,
function...) entering only its name.
In most of the cases
that's enough because only one item has that name.
instead there are more items with the same name, Matrex displays this
dialog to let the user select the item exactly, with its name and
Clicking OK the selected item is returned.
the Cancel button the dialog is closed but nothing is