Index: lams_gradebook/web/releaseLessonMarks.jsp
===================================================================
diff -u -r67eb08b1f83112e23be227fbf6923a46d0dc95ba -ra8e04b385dbb553c581bd705426a86ab92e85f9a
--- lams_gradebook/web/releaseLessonMarks.jsp	(.../releaseLessonMarks.jsp)	(revision 67eb08b1f83112e23be227fbf6923a46d0dc95ba)
+++ lams_gradebook/web/releaseLessonMarks.jsp	(.../releaseLessonMarks.jsp)	(revision a8e04b385dbb553c581bd705426a86ab92e85f9a)
@@ -47,7 +47,7 @@
 		   		{name:'name',index:'name', sortable: false, sorttype: 'text'}
 		   	],
 		    rowList:[10,20,30,40,50,100],
-		   	rowNum:10,
+		   	rowNum:1,
 		   	pager: true,
 		   	sortname: 'name',
 		   	multiselect: true,
@@ -79,8 +79,94 @@
 					   });
 			   }
 			   return false;
-			}
-		});
+			},
+		    onSelectRow : function(id, status, event) {
+			    var grid = $(this),
+			   		included = grid.data('included'),
+					excluded = grid.data('excluded'),
+					selectAllChecked = grid.closest('.ui-jqgrid-view').find('.jqgh_cbox .cbox').prop('checked');
+				if (selectAllChecked) {
+					var index = excluded.indexOf(+id);
+					// if row is deselected, add it to excluded array
+					if (index < 0) {
+						if (!status) {
+							excluded.push(+id);
+						}
+					} else if (status) {
+						excluded.splice(index, 1);
+					}
+				} else {
+					var index = included.indexOf(+id);
+					// if row is selected, add it to included array
+					if (index < 0) {
+						if (status) {
+							included.push(+id);
+						}
+					} else if (!status) {
+						included.splice(index, 1);
+					}
+				}
+			},
+			gridComplete : function(){
+				let grid = $(this),
+						   included = grid.data('included'),
+						   // cell containing "(de)select all" button
+						   selectAllCell = grid.closest('.ui-jqgrid-view').find('.jqgh_cbox > div');
+				// remove the default button provided by jqGrid
+				$('.cbox', selectAllCell).remove();
+				// create own button which follows own rules
+				var selectAllCheckbox = $('<input type="checkbox" class="cbox" />')
+										.prop('checked', included === null)
+										.prependTo(selectAllCell)
+										.change(function(){
+											// start with deselecting everyone on current page
+											grid.resetSelection();
+											if ($(this).prop('checked')){
+												// on select all change mode and select all on current page
+												grid.data('included', null);
+												grid.data('excluded', []);
+												$('[role="row"]', grid).each(function(){
+													grid.jqGrid('setSelection', +$(this).attr('id'), false);
+												});
+											} else {
+												// on deselect all just change mode
+												grid.data('excluded', null);
+												grid.data('included', []);
+											}
+										});
+	
+				grid.resetSelection();
+				if (selectAllCheckbox.prop('checked')) {
+					var excluded = grid.data('excluded');
+					// go through each loaded row
+					$('[role="row"]', grid).each(function(){
+						var id = +$(this).attr('id'),
+							selected = $(this).hasClass('success');
+						// if row is not selected and is not excluded, select it
+						if (!selected && (!excluded || !excluded.includes(id))) {
+							// select without triggering onSelectRow
+							grid.jqGrid('setSelection', id, false);
+						}
+					}); 
+				} else {
+					// go through each loaded row
+					$('[role="row"]', grid).each(function(){
+						var id = +$(this).attr('id'),
+							selected = $(this).hasClass('success');
+						// if row is not selected and is included, select it
+						if (!selected && included.includes(id)) {
+							// select without triggering onSelectRow
+							grid.jqGrid('setSelection', id, false);
+						}
+					});
+				}
+
+				// empty email preview on grid page change
+				$('#release-marks-email-preview').slideUp(function(){
+					 $('#release-marks-email-preview-content', this).empty();
+				});
+			}}).data({'included' : null, 
+				 	  'excluded' : []});
 	});
 	
 	function toggleMarksRelease() {
@@ -116,10 +202,16 @@
 	}
 	
 	function sendReleaseMarksEmails(){
+		let grid = $("#release-marks-learner-list"),
+			includedLearners = grid.data('included'),
+			excludedLearners = grid.data('excluded');
+	
 		$.ajax({
 			'url'      : '<lams:LAMSURL/>gradebook/gradebookMonitoring/sendReleaseMarksEmails.do',
 			'data'     : {
-				'lessonID' : releaseMarksLessonID
+				'lessonID' : releaseMarksLessonID,
+				 'includedLearners' : includedLearners === null ? null : JSON.stringify(includedLearners),
+				 'excludedLearners' : excludedLearners === null ? null : JSON.stringify(excludedLearners)
 			 },
 			'dataType' : 'text',
 			'cache'    : false,