Is there command for 7zip extract from/ extract here?
Where do I found this command, like the syntax? Do I need to read both dopus and 7zip syntax for that?
On the default toolbars, in the Archive Files menu/button.
Or in the right-click context menus (unless turned off in Preferences / Zip & Other Archives / Context Menu).
Or via right-click drag & drop.
Or by double-clicking the archives to go into them and copying things out like you would normal files/folders.
In addition to what Leo said with the built in functionality, if you want to actually manually run the command directly with 7zip like through a button function to be able to control the behavior, here's an example I have for one of my buttons:
// 7z is the command line version, 7zFM is the GUI.
// -o is for output directory but doesn't take a space between it and the path for some dumb reason.
// x extracts with the archive's folder structure intact, e would put all in one directory
7z x {filepath$} -o"{sourcepath$}\{file$|noext}-Extracted"
That takes the currently selected file or archive and outputs to a folder by the same name (but without the extension), and adds -Extracted to the end of the name, but you can leave that off or change it how you want.
I use that button for filetypes that 7zip is able to extract because under the hood they are actually archives (like .docx files just being zip files for example), as well as for files that aren't really archives but 7zip can still extract like .msi files. (Technically I use Nanazip, a fork of 7zip, but it's the same syntax).
Also you can take note of the comments I have, for example the thing about -o requiring you not have a space after it took me forever to figure out.
Also you might need to put the full path to 7z.exe instead of just 7z, like:
"C:\Program Files\7-Zip\7z.exe"