diff --git a/packages/ezflow_extension/ezextension/ezflow/datatypes/ezpage/ezpagetype.php b/packages/ezflow_extension/ezextension/ezflow/datatypes/ezpage/ezpagetype.php
index 389f2c35..a8196da2 100644
--- a/packages/ezflow_extension/ezextension/ezflow/datatypes/ezpage/ezpagetype.php
+++ b/packages/ezflow_extension/ezextension/ezflow/datatypes/ezpage/ezpagetype.php
@@ -313,7 +313,14 @@ function fetchObjectAttributeHTTPInput( $http, $base, $contentObjectAttribute )
 
                     foreach ( $params as $param => $value )
                     {
-                        $customAttributes[$param] = $value;
+                        if (is_array($value))
+                        {
+                            $customAttributes[$param] = implode(',', $value);
+                        }
+                        else
+                        {
+                            $customAttributes[$param] = $value;
+                        }
                     }
 
                     $block->setAttribute( 'custom_attributes', $customAttributes );
diff --git a/packages/ezflow_extension/ezextension/ezflow/design/standard/templates/block/edit/edit.tpl b/packages/ezflow_extension/ezextension/ezflow/design/standard/templates/block/edit/edit.tpl
index 7c53d402..6797b2dc 100644
--- a/packages/ezflow_extension/ezextension/ezflow/design/standard/templates/block/edit/edit.tpl
+++ b/packages/ezflow_extension/ezextension/ezflow/design/standard/templates/block/edit/edit.tpl
@@ -86,6 +86,11 @@
              $custom_attribute_types = array()
              $custom_attribute_names = array()
              $custom_attribute_selections = array()
+             $custom_attribute_value = ''
+             $custom_attribute_values = array()
+             $custom_attribute_default = ''
+             $custom_attribute_multiselect_setting = false()
+             $custom_attribute_multiselect_value = false()
              $loop_count = 0}
         {if ezini_hasvariable( $block.type, 'CustomAttributes', 'block.ini' )}
             {set $custom_attributes = ezini( $block.type, 'CustomAttributes', 'block.ini' )}
@@ -129,12 +134,66 @@
                         <input id="block-custom_attribute-{$block_id}-{$loop_count}" class="textfield block-control" type="text" name="ContentObjectAttribute_ezpage_block_custom_attribute_{$attribute.id}[{$zone_id}][{$block_id}][{$custom_attrib}]" value="{$block.custom_attributes[$custom_attrib]|wash()}" />
                         {/case}
                         {case match = 'select'}
-                            {set $custom_attribute_selections = ezini( $block.type, concat( 'CustomAttributeSelection_', $custom_attrib ), 'block.ini' )}
-                            <select id="block-custom_attribute-{$block_id}-{$loop_count}" class="block-control" name="ContentObjectAttribute_ezpage_block_custom_attribute_{$attribute.id}[{$zone_id}][{$block_id}][{$custom_attrib}]">
-                                {foreach $custom_attribute_selections as $selection_value => $selection_name}
-                                    <option value="{$selection_value|wash()}"{if eq( $block.custom_attributes[$custom_attrib], $selection_value )} selected="selected"{/if} />{$selection_name|wash()}</option>
-                                {/foreach}
-                            </select>
+                        {set $custom_attribute_selections = ezini( $block.type, concat( 'CustomAttributeSelection_', $custom_attrib ),'block.ini' )}
+
+                        {* Check if there is a default value for the select *}
+                        {if ezini_hasvariable( $block.type, concat( 'CustomAttributeSelectionDefault_', $custom_attrib ), 'block.ini' )}
+                            {set $custom_attribute_default = ezini( $block.type, concat( 'CustomAttributeSelectionDefault_', $custom_attrib ), 'block.ini' )}
+                        {else}
+                            {set $custom_attribute_default = ''}
+                        {/if}
+
+                        {* Check if this is a new block *}
+                        {if is_set( $block.custom_attributes[$custom_attrib] )}
+                            {set $custom_attribute_value = $block.custom_attributes[$custom_attrib]}
+                        {else}
+                            {set $custom_attribute_value = $custom_attribute_default}
+                        {/if}
+
+                        {* Test for multiselect option *}
+                        {set $custom_attribute_multiselect_setting = ezini_hasvariable( $block.type, concat( 'CustomAttributeSelectionMultiple_', $custom_attrib ), 'block.ini' )}
+                        {* If multiselect select option is set, use the value *}
+                        {if $custom_attribute_multiselect_setting}
+                            {* If multiselect is enabled *}
+                            {set $custom_attribute_multiselect_value = ezini( $block.type, concat( 'CustomAttributeSelectionMultiple_', $custom_attrib ), 'block.ini' )|eq( 'enabled' )}
+                        {else}
+                            {* Default value is false - single select *}
+                            {set $custom_attribute_multiselect_value = false()}
+                        {/if}
+
+                        {* Set custom_attribute_values based on the multiselect setting value *}
+                        {if $custom_attribute_multiselect_value}
+                            {set $custom_attribute_values = $custom_attribute_value|explode(',')}
+                        {else}
+                            {set $custom_attribute_values = array( $custom_attribute_value )}
+                        {/if}
+
+
+                        {def $i_selected = ''}
+                        <select id="block-custom_attribute-{$block_id}-{$loop_count}" class="block-control" name="ContentObjectAttribute_ezpage_block_custom_attribute_{$attribute.id}[{$zone_id}][{$block_id}][{$custom_attrib}]{if $custom_attribute_multiselect_value}[]" multiple="multiple" size="{min($custom_attribute_selections|count(), 6)}{else}" size="1{/if}">
+
+                        {* If an allow empty option has been set *}
+                        {if ezini_hasvariable( $block.type, concat( 'CustomAttributeSelectionEmpty_', $custom_attrib ), 'block.ini' )}
+                            {* Test allow empty option, this ensures the value is sent to the server and set *}
+                            {if ezini( $block.type, concat( 'CustomAttributeSelectionMultiple_', $custom_attrib ), 'block.ini' )|eq( 'enabled' )}
+                            <option value="" {if $custom_attribute_value|eq('')}selected="selected"{/if} title="Empty/No selection">--</option>
+                            {/if}
+                        {/if}
+
+                        {foreach $custom_attribute_selections as $selection_value => $selection_name}
+
+                            {* mark option as selected *}
+                            {set $i_selected = ''}
+                            {foreach $custom_attribute_values as $value}
+                                {if eq( $value|trim(), $selection_value|trim() )}
+                                    {set $i_selected = 'selected="selected"'}
+                                    {break}
+                                {/if}
+                            {/foreach}
+
+                            <option value="{$selection_value|trim()|wash()}" {$i_selected}>{$selection_name|wash()}</option>
+                        {/foreach}
+                        </select>
                         {/case}
                         {case}
                         <input id="block-custom_attribute-{$block_id}-{$loop_count}" class="textfield block-control" type="text" name="ContentObjectAttribute_ezpage_block_custom_attribute_{$attribute.id}[{$zone_id}][{$block_id}][{$custom_attrib}]" value="{$block.custom_attributes[$custom_attrib]|wash()}" />
diff --git a/packages/ezflow_extension/ezextension/ezflow/settings/block.ini b/packages/ezflow_extension/ezextension/ezflow/settings/block.ini
index 794da2e3..8720c437 100644
--- a/packages/ezflow_extension/ezextension/ezflow/settings/block.ini
+++ b/packages/ezflow_extension/ezextension/ezflow/settings/block.ini
@@ -72,9 +72,27 @@ RootSubtree=1
 # text / checkbox / select / string (default)
 # CustomAttributeTypes[node_id]=string
 # CustomAttributeTypes[color]=select
+# Select attribute configuration
+#     CustomAttributeSelection_name[value]=Label
+#         name must correspond to a CustomAttributeTypes[name]=select setting
+#         value is the value which will be stored. It MUST NOT contain commas.
+#         Label is the label that will be displayed in the select input.  It may be any string.
+#     CustomAttributeSelectionDefault_name=value
+#         This sets the default value of the select input. value must match a CustomAttributeSelection_name[value] setting
+#         Multiple values may be included, separated by commas
+#         If this value is omitted, the default is assumed to be an empty string
+#     CustomAttributeSelectionEmpty_name=enabled
+#         Indicates whether the selection can be empty. When enabled, an empty value with the label '--' will be added to the select
+#     CustomAttributeSelectionMultiple_name=enabled
+#         Multiple selections may be enabled by setting CustomAttributeSelectionMultiple_name to enabled
 # CustomAttributeSelection_color[]
 # CustomAttributeSelection_color[blue]=Blue
 # CustomAttributeSelection_color[green]=Green
+# CustomAttributeSelection_color[red]=Red
+# Set the default
+# CustomAttributeSelectionDefault_color=green,red
+# Allow multiple items to be selected
+# CustomAttributeSelectionMultiple_color=enabled
 # UseBrowseMode[node_id]=true
 # Optional: set the browse mode start node for a custom attribute
 # CustomAttributeStartBrowseNode[node_id]=<node_id>