Hi Sherzod,
.x-panel-body-default only effects label, and .x-form-text-default only effects edit, combox ect. Others such as menu, button, grid, treeview, pagecontrol, panel.title, form.caption, don't change their fontsize.
I set *{font-size:12px} , it can effects many components, but not contains button, grid.pagebar, panle.title, tabsheet.title ect.
How to change default fontsize with all components? Or, how to get their css style classnames, so I can set these css classes one by one . Thanks! (uni-1.50.0.1480)