Page title

How to change Page title ?

Now is set to %%title%% %%page%% %%sep%% %%sitename%%

After page title is added site name but I want to add –
Page title – Site Name

I tried with %%title%% %%page%% %%sep%% -%%sitename%%
%%title%% %%page%% %%sep%% %%-sitename%%

https://ww.wp.xz.cn/plugins/wordpress-seo/