Hi Stephan,
To remove the text of the custom commands you should specify a single space in the Text() method.
E.g.
Then you could easily manipulate the buttons through their CSS classes. Each button has an auto generated
"k-grid-NAME_OF_COMMAND" class.
If you want to add some of the default Kendo icons to the button, you could do it on
dataBound and attach the required classes to the <span> element inside the button.
E.g.
All the best,
Dimiter Madjarov
the Telerik team
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