Find some ways on the internet, not very good, or the ExtJS style to the fastest ...
Add the following CSS to the page used by ExtJS.
. X-BTN-DEFAULT-LARGE-MC{Padding-bottom:0px!important;Padding-left:0px!important;Padding-top:0px!important;Padding-right:0px!important;}. X-BTN-DEFAULT-LARGE-TC{Height:0px!important;}. X-btn-default-large-tr{Padding-right:0px!important;}. X-btn-default-large-tl{Padding-left:0px!important;}. X-BTN-DEFAULT-LARGE-BL{Padding-left:0px!important;}. X-BTN-DEFAULT-LARGE-BR{Padding-right:0px!important;}. X-BTN-DEFAULT-LARGE-MR{Padding-right:0px!important;}. X-BTN-DEFAULT-LARGE-ML{Padding-left:0px!important;}. X-BTN-DEFAULT-LARGE-BC{Height:0px!important;}
Button Property Scale : ' Large '
Ext.define (' HJ.view.Draw.DrawLineBtn ', { ' Ext.button ', ' widgets. Drawlinebtn ', ' drawlinebtn ', //text: ' polyline ', iconcls: ' Drawlinebtn ', ' large ', ' top ', ' a ', ';
Look at the effect. ^^
"ExtJS" large button, picture all overlay button