Hello,
You can always centralize everything inside particular Div:
html.Div([
dcc.Slider(
id=‘years-slider’,
min=min(years),
max=max(years),
value=min(years),
marks={str(year): str(year) for year in years_by_step},
)
], style = {‘width’: ‘100%’, ‘display’: ‘flex’, ‘align-items’: ‘center’, ‘justify-content’: ‘center’})