diff --git a/app/src/main/cpp/droidboot_gui b/app/src/main/cpp/droidboot_gui
index ba6da4f9..b0c0b94c 160000
--- a/app/src/main/cpp/droidboot_gui
+++ b/app/src/main/cpp/droidboot_gui
@@ -1 +1 @@
-Subproject commit ba6da4f93b31567db31d5f448fbe18e3a4559fa4
+Subproject commit b0c0b94c86a557e18d6b3cd518fdfe429b561bda
diff --git a/app/src/main/java/org/andbootmgr/app/MainActivity.kt b/app/src/main/java/org/andbootmgr/app/MainActivity.kt
index af1b176d..a6636e14 100644
--- a/app/src/main/java/org/andbootmgr/app/MainActivity.kt
+++ b/app/src/main/java/org/andbootmgr/app/MainActivity.kt
@@ -213,7 +213,7 @@ class MainActivity : ComponentActivity() {
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-private fun AppContent(vm: MainActivityState, view: @Composable (PaddingValues) -> Unit) {
+fun AppContent(vm: MainActivityState, view: @Composable (PaddingValues) -> Unit) {
 	val drawerState = vm.drawerState!!
 	val scope = vm.scope!!
 	var fabhint by remember { mutableStateOf(false) }
diff --git a/app/src/main/java/org/andbootmgr/app/Themes.kt b/app/src/main/java/org/andbootmgr/app/Themes.kt
index 60281881..04f75301 100644
--- a/app/src/main/java/org/andbootmgr/app/Themes.kt
+++ b/app/src/main/java/org/andbootmgr/app/Themes.kt
@@ -1,10 +1,31 @@
 package org.andbootmgr.app
 
 import android.content.Intent
+import android.widget.Toast
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.Button
+import androidx.compose.material3.DrawerValue
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextField
+import androidx.compose.material3.rememberDrawerState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateMapOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.setValue
+import androidx.compose.runtime.snapshots.SnapshotStateMap
+import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
+import androidx.navigation.compose.rememberNavController
+import org.andbootmgr.app.util.ConfigFile
+import java.io.File
+import java.util.Random
 
 /*
     uint32_t win_bg_color;
@@ -28,6 +49,36 @@ import androidx.compose.ui.res.stringResource
  */
 @Composable
 fun Themes(vm: MainActivityState) {
+	val c = remember {
+		try {
+			if (vm.logic == null)
+				throw ActionAbortedCleanlyError(Exception("Compose preview special-casing"))
+			ConfigFile.importFromFile(File(vm.logic!!.abmDb, "db.conf"))
+		} catch (e: ActionAbortedCleanlyError) {
+			if (vm.activity != null) // Compose preview special-casing
+				Toast.makeText(vm.activity, vm.activity!!.getString(R.string.malformed_dbcfg), Toast.LENGTH_LONG).show()
+			ConfigFile().also {
+				it["default"] = "Entry 01"
+				it["timeout"] = "5"
+			}
+		}
+	}
+	val e = remember { mutableStateMapOf<Long, Boolean>() }
+	ConfigTextField(c, e, "COLOR", "win_bg_color", "hmm")
+	Button(onClick = {
+		if (e.containsValue(false))
+			Toast.makeText(vm.activity!!, vm.activity!!.getString(R.string.invalid_in), Toast.LENGTH_LONG).show()
+		else {
+			try {
+				c.exportToFile(File(vm.logic!!.abmDb, "db.conf"))
+			} catch (e: ActionAbortedError) {
+				Toast.makeText(vm.activity!!, vm.activity!!.getString(R.string.failed2save), Toast.LENGTH_LONG)
+					.show()
+			}
+		}
+	}, enabled = !e.containsValue(false)) {
+		Text(stringResource(R.string.save_changes))
+	}
 	Button(onClick = {
 		vm.activity!!.startActivity(Intent(vm.activity!!, Simulator::class.java).apply {
 			putExtra("sdCardBlock", vm.deviceInfo!!.bdev)
@@ -35,4 +86,42 @@ fun Themes(vm: MainActivityState) {
 	}) {
 		Text(text = stringResource(id = R.string.simulator))
 	}
+}
+
+@Composable
+private fun ConfigTextField(c: ConfigFile, e: SnapshotStateMap<Long, Boolean>, text: String, configKey: String, default: String = "") {
+	val id = remember { Random().nextLong() }
+	var value by remember { mutableStateOf(c[configKey] ?: default) }
+	TextField(
+		value = value,
+		onValueChange = {
+			value = it
+			c[configKey] = it.trim()
+			e[id] = true
+		},
+		label = { Text(text) },
+		isError = !(e[id] ?: true)
+	)
+	if (e[id] == false) {
+		Text(stringResource(id = R.string.invalid_in), color = MaterialTheme.colorScheme.error)
+	} else {
+		Text("") // Budget spacer
+	}
+}
+
+@Preview
+@Composable
+fun ThemePreview() {
+	val vm = MainActivityState()
+	val navController = rememberNavController()
+	val drawerState = rememberDrawerState(DrawerValue.Closed)
+	val scope = rememberCoroutineScope()
+	vm.navController = navController
+	vm.drawerState = drawerState
+	vm.scope = scope
+	AppContent(vm) {
+		Box(modifier = Modifier.padding(it)) {
+			Themes(vm)
+		}
+	}
 }
\ No newline at end of file