Toolbar
From Documentation
Purpose
ZK Spreadsheet supports various toolbar buttons for user to perform actions.
Show toolbar
Use Spreadsheet.setShowToolbar to show toolbar.
Action Handler
The Spreadsheet use a default ActionHandler to perform toolbar button's action. Developer could use customized ActionHandler by API Spreadsheet.setActionHandler or by library property org.zkoss.zss.ui.ActionHandler.class
ZUML
Here is a sample example ZUL file