How add to bottom bar buttons 'next-sheet' and 'prev-sheet' in spreadsheet?

i need switch between lists in spreadsheet. how can i do this?
webix.ui(
{
view: ‘spreadsheet’,
datatype: ‘excel’,
url: binary->${url},
toolbar: true,
bottombar: true,
liveEditor: true,
resizeCell: false,})

Hello,
There are already buttons at the bottom bar of the Spreadsheet: Code Snippet. Could you please clarify if you’d like to make changes to the existing buttons, or if you’re looking to add something new?