> Perhaps the word recognized or recognised may be used.

Noted, however is the below of any use in considering documentation improvement?

I presume there is some association of the .html file with the dropsite.tcl file.

As follows is the grep output for the -dropovercmd events being documented.

$ grep Enter *.tcl
arrow.tcl:    bind BwArrowButtonC <Enter>           {ArrowButton::_enter %W}
button.tcl:    bind BwButton <Enter>           {Button::_enter %W}
color.tcl:        bind $f <Enter> {focus %W}
color.tcl:    bind $f <Enter> {focus %W}
combobox.tcl:            $listb bindText  <Enter> [list $listb selection set]
combobox.tcl:            $listb bindImage <Enter> [list $listb selection set]
dialog.tcl:    bind $path <KP_Enter>  [list ButtonBox::invoke $path.bbox default]
dynhelp.tcl:    bind BwHelpBalloon <Enter>   {DynamicHelp::_motion_balloon enter  %W %X %Y}
dynhelp.tcl:    bind BwHelpVariable <Enter>   {DynamicHelp::_motion_info %W}
dynhelp.tcl:        $path bind BwHelpBalloon <Enter> \
dynhelp.tcl:        $path tag bind $tagOrItem <Enter> \
dynhelp.tcl:        $path bind BwHelpVariable <Enter> \
dynhelp.tcl:        $path tag bind $tagOrItem <Enter> \
notebook.tcl:        $path.c bind p:$page <Enter> \
notebook.tcl:        $path.c bind $page:jmg <Enter> \
$ grep Leave *.tcl
arrow.tcl:    bind BwArrowButtonC <Leave>           {ArrowButton::_leave %W}
button.tcl:    bind BwButton <Leave>           {Button::_leave %W}
dynhelp.tcl:    bind BwHelpBalloon <Leave>   {DynamicHelp::_motion_balloon leave  %W %X %Y}
dynhelp.tcl:    bind BwHelpVariable <Leave>   {DynamicHelp::_leave_info  %W}
dynhelp.tcl:        $path bind BwHelpBalloon <Leave> \
dynhelp.tcl:        $path tag bind $tagOrItem <Leave> \
dynhelp.tcl:        $path bind BwHelpVariable <Leave> \
dynhelp.tcl:        $path tag bind $tagOrItem <Leave> \
dynhelp.tcl:#    Leave event may be called twice (in case of pointer grab)
notebook.tcl:           # the <Leave> event fires and resets data($page,rimage) before
notebook.tcl:        $path.c bind p:$page <Leave> \
notebook.tcl:        $path.c bind $page:jmg <Leave> \
$ grep Motion *.tcl
color.tcl:    bind $c1 <B1-Motion>     [list SelectColor::_select_hue_sat %x %y]
color.tcl:    bind $c2 <B1-Motion>     [list SelectColor::_select_value %x %y]
combobox.tcl:    ::bind ListBoxHotTrack <Motion> {
dragsite.tcl:    bind BwDrag1 <B1-Motion>     {DragSite::_begin_drag motion %W %s %X %Y}
dragsite.tcl:    bind BwDrag2 <B2-Motion>     {DragSite::_begin_drag motion %W %s %X %Y}
dragsite.tcl:    bind BwDrag3 <B3-Motion>     {DragSite::_begin_drag motion %W %s %X %Y}
dropsite.tcl:    bind $top <B$evt-Motion>       {DropSite::_motion  %X %Y}
dropsite.tcl:    bind $top <Motion>             {DropSite::_release %X %Y}
dropsite.tcl:    set script [bind $_top <B$_evt-Motion>]
dropsite.tcl:    bind $_top <B$_evt-Motion> {}
dropsite.tcl:    bind $_top <Motion>        {}
dropsite.tcl:                bind $_top <B$_evt-Motion> {DropSite::_motion  %X %Y}
dropsite.tcl:                bind $_top <Motion>        {DropSite::_release %X %Y}
dropsite.tcl:        bind $_top <B$_evt-Motion> {DropSite::_motion  %X %Y}
dropsite.tcl:        bind $_top <Motion>        {DropSite::_release %X %Y}
dynhelp.tcl:    bind BwHelpBalloon <Motion>  {DynamicHelp::_motion_balloon motion %W %X %Y}
dynhelp.tcl:        $path bind BwHelpBalloon <Motion> \
dynhelp.tcl:        $path tag bind $tagOrItem <Motion> \
dynhelp.tcl:        $path bind BwHelpVariable <Motion> \
dynhelp.tcl:        $path tag bind $tagOrItem <Motion> \
panedw.tcl:        bind $top <Motion>          [list PanedWindow::_move_sash $top $xmin $xmax %X +%%d+$yr]
panedw.tcl:        bind $top <Motion>          [list PanedWindow::_move_sash \
scrollview.tcl:    bind BwScrollView <B1-Motion>   [list ScrollView::_set_view %W motion %x %y]
statusbar.tcl:    bind StatusResize <B1-Motion> \
$