How to Implement Meta Tags Like WordPress in DLE

[Hashigato]

Hello friends, on my WordPress site, the title section is in the format of "slogan - sitename" for example "WordPress Help Blog - Wpyardimi.com". However, on my DLE site, it's not the same. I specify the keywords, description, and title in the panel, but only the "sitename" appears in the title section, such as "Wpyardimi.com". To make it similar to WordPress, which file should I edit to achieve this? I also want the posts to have the format "Post Title --- Site Name" in the title.