I create my specific grid skin.
I need to change plus and minus signs in group row at my own. Can I to make it without overwriting files “codebase/imgs/minus.gif” and “codebase/imgs/plus.gif”?
Unfortunately there is no more simple way.
You can overwrite existing images , or change the line in code, which renders related HTML.
dhtmlxgrid_group.js, line 207
var html=" ";