Hi,
Yes, it is possible.
Please refer to description of predefined <button> tag in Genesys Desktop 7.6 XML Tag Reference.
Description
Defines a button or a button menu.
The <name> tag is mandatory.
To define the button action, use the <action> tag.
You can add predefined buttons to your extension, by specifying for the button a predefined name with the <name> tag. In this case, you must not define an action for the button. For further details about which predefined names are available, refer to the parent's tag description.
If the <interaction-secondary-controls> tag encloses the button definition, you can set images for this button by using the <enabled-image> and <disabled-image> child tags.
Please refer to table reflecting "List of traceable actions" in a Genesys Desktop 7.6 Developer’s Guide to get overall view of possible actions.
Roman T