tooltip in dhtmlxgrid

tooltip is not appearing when mouse cursor is moved to column header.

Also, if row content have value with > sign in it, tooltip shows > instead of >.

How can i solve these issues?

Please help.

>>tooltip is not appearing when mouse cursor is moved to column header.
Currently tooltips works for data part only. If you need them for headers you can use complex form of header initialization.
Instead of
    grid.setHeader(“hA,hB”)
use
    grid.setHeader(“hA,hA”);

>>if row content have value with > sign in it, tooltip shows > instead of >
By default tooltip show actual content of cell, where all special chars replaced by related entities.
Basically it is possible to update _drawTooltip function and use
    ced.cell.innerText||ced.cell.textConted 
instead of
    ced.getValue();