Latest build have this function. Only works when multiselect is false.

You can edit jqgrid_dist.php and edit following:

<?php if ($this->options["resizable"] === true) { ?>
jQuery("#<?php echo $grid_id?>").jqGrid('gridResize',{});
<?php } ?>

// bind arrow keys navigation <———————————– add following
jQuery("#<?php echo $grid_id?>").jqGrid('bindKeys');

Abu, thank you.
This is perfect, but to open the edit dialog, after selecting the line with the arrow keys, is possible to use the "enter" key? and how?
Thanks in advance
Massimo Gagliardi

You can enable inline edit, but dialog edit is having some issues with onEnter event.

jQuery("#<?php echo $grid_id?>").jqGrid('bindKeys',{'onEnter':function(rowid){ jQuery("tr.jqgrow[id="+rowid+"]").dblclick(); } });