Symptoms
We would like to have some more options regarding icons we can use for the toolbar button.
Diagnoses
1.) You can use an "image control". Here you can select the control's image yourself. This control does have a "onClick" event (Amounts others) that you can use.
2.) You can add the following key under the "appSettings" section in the designer web.config.
"<add key="Forms.Controls.ShowSystemIcons" value="true" />"
This will expose all the icons that we use in the designer.
3.) There is a community control that might also be of some interest. (Please note that this is a 3rd party control and is not supported by K2. If you run into issues using the control, please contact the control's owner for assistance.) http://community.k2.com/t5/K2-blackpearl/Image-button/ba-p/1039_
Resolution
In addition to the other options, we log a feature request as well. Once implemented, you should be able to browse for any picture you want and that will get displayed on the toolbar button.