I want to change the design of some elements in CUBA. Is it possible to change default elements like filters or tables? For example I want to make a new order of the elements at the filter section over a table. I also want to remove all the borders of the table. Already tried to style with stylename="borderless no-vertical-lines no-horizontal-lines" in xml, but there are still borders left. Anybody here who can help? (I use the hover theme)
If you want to modify filter component layout, there is some degree of flexibility - see cuba.gui.genericFilterControlsLayout property.
https://doc.cuba-platform.com/manual-7.2/app_properties_reference.html#cuba.gui.genericFilterControlsLayout
To create new styles for existing components, you need to extend theme (hover in your case) in Studio. Invoke in main menu: CUBA -> Advanced -> Manage themes -> Create theme extension. Then you will be able to define additional styles in the theme .scss files. See https://doc.cuba-platform.com/studio/#generic_ui_themes and https://doc.cuba-platform.com/manual-7.2/web_theme_extension.html#web_theme_extension_styles for more information.