The CSS above will remove webpart text buttons from the whole page (all webparts), if you want to remove it only for the main body and not the right side panel use the more restrictive selector:

Ext.select('td.labkey-body-panel div.labkey-wp-text-buttons').setStyle('visibility', 'hidden');


Firebug and its element inspector is the best place to dive into the HTML and try out css rules, again this is more of a hack then a solution.

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Anthony