How to add more indentation in the Visual Studio code explorer file tree structure?

How to add more indentation in a file tree structure? It has a little bit indentation I want to increase more just like NetBeans.

check the image

Go to File > Preference > Settings and choose:

Workbench › Tree: Indent

Controls tree indentation in pixels.

or (in your settings.json enter this directly)

 "workbench.tree.indent": 10

and choose a high enough number for you.

Also see my answer at Visual Studio code sidebar Vertical guideline (customize sidebar) where with v1.36 you can add colorized tree indent guides to make the explorer file structure more obvious.

The example picture uses: "tree.indentGuidesStroke": "#00ff00" in the colorCustomizations, so the guidelines will appear green.

{                                         // in settings.json
  "workbench.colorCustomizations": {
    "tree.indentGuidesStroke": "#00ff00"
}

For Mac, using your menu bar would be

Code > Preferences > Settings

Then at the Search settings type: tree or go to

Workbench > Appearance > Tree: Indent (Controls tree indentation in pixels)

and set your preferred indentation

If you just want to change the indentation you can set these options:
Press Ctrl+Shift+P -> Go to Preferences: Open Settings (JSON)

"workbench.tree.indent": 18,

You can add guidelines as well with:

"workbench.tree.renderIndentGuides": "always",

You can also change their color using:

"workbench.colorCustomizations": {
    "tree.indentGuidesStroke": "#008070"
},

Besides the other answers involving settings files, the indentation may also be changed in the Files / Preferences / Settings GUI: