Remove field from sorting of column

[tomalex0]

im using Grouping store in grid ,i have to group the list with respect to User mentioned below but i dont want to show the User in sort--->columns---> how can remove User alone from that column

this.columnModel = new Ext.grid.ColumnModel([new Ext.grid.RowNumberer() {

    header: 'Domain',

    readOnly: true,

    dataIndex: 'name',

    width: 200,

    hidden: false

},
{

    header: 'User',

    readOnly: true,

    dataIndex: 'user',

    width: 60,

    hidden: true,


}]);

for example
http://www.extjs.net/deploy/dev/exam...id-filter.html

from above mentioned page i dont want to show "Company" in sorting--->Columns--> , how can i do that

[Condor]

Columns with fixed:true or hideable:false are not shown in the columns menu.

[nctag]

try the following (as condor said too):

this.columnModel = new Ext.grid.ColumnModel([new Ext.grid.RowNumberer() {
header: 'Domain',
readOnly: true,
dataIndex: 'name',
width: 200,
hidden: false
},
{
header: 'User',
readOnly: true,
dataIndex: 'user',
width: 60,
hidden: true,
hideable: false
}]);