How to change width of Left Navigation Bar

[nextcloudfan]

I need to change it global for whole nextcloud
Check please picture

or on imugr https://i.imgur.com/0pzRLJk.png

are those setings somewhere in css ? Where please …
I really appreciate your help.

[eehmke]

Hello, activate the App: Custom CSS. Next, in the Theming tab you will find a new input box for Custom CSS. There you can enter:

#app-navigation {
    width: 200px;
}

Enter your width as needed.

The CSS items to modify you can find using the Firefox inspector.

[nextcloudfan]

you are the MAN! thank you