my $n = $globals_main->NoteBook(-ipadx => 6,
                                -ipady => 6);

my $basic_p = $n->add("basic",
                          -label => "Basic",
                          -underline => 0);

$basic_p->LabEntry(-label => "number of samples to load for inference",
                      -labelPack => [-side => "left", -anchor => "w"],
                      -width => 10,
                      -textvariable => \$load_samples
                     )->pack(-side => "top", -anchor => "nw");