File Explorer File Extensions

config/tweaks.json

1278  "WPFToggleShowExt": {
1279    "Content": "File Explorer File Extensions",
1280    "Description": "If enabled, File extensions (e.g., .txt, .jpg) are visible.",
1281    "category": "Customize Preferences",
1282    "panel": "2",
1283    "Type": "Toggle",
1284    "registry": [
1285      {
1286        "Path": "HKCU:\\Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced",
1287        "Name": "HideFileExt",
1288        "Value": "0",
1289        "Type": "DWord",
1290        "OriginalValue": "1",
1291        "DefaultState": "false"
1292      }
1293    ],
1294    "InvokeScript": [
1295      "
1296      Invoke-WinUtilExplorerUpdate -action \"restart\"
1297      "
1298    ],
1299    "UndoScript": [
1300      "
1301      Invoke-WinUtilExplorerUpdate -action \"restart\"
1302      "
1303    ],

Registry Changes

Applications and System Components store and retrieve configuration data to modify Windows settings, so we can use the registry to change many settings in one place.

You can find information about the registry on Wikipedia and Microsoft’s Website.