diff --git a/app/src/main/java/com/lhw/pdf/MainActivity.kt b/app/src/main/java/com/lhw/pdf/MainActivity.kt
index 1b37877..87acc5d 100644
--- a/app/src/main/java/com/lhw/pdf/MainActivity.kt
+++ b/app/src/main/java/com/lhw/pdf/MainActivity.kt
@@ -24,6 +24,7 @@ import androidx.drawerlayout.widget.DrawerLayout
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.WindowCompat
 import androidx.core.view.WindowInsetsCompat
+import com.google.android.material.chip.Chip
 import com.lhw.pdf.databinding.ActivityMainBinding
 import com.tom_roush.pdfbox.android.PDFBoxResourceLoader
 import java.io.File
@@ -195,17 +196,16 @@ class MainActivity : AppCompatActivity() {
             presentations.values.forEach {it.setScrollProgress(progress)}
         }
 
-        binding.appBarMain.contentMain.chipPages1.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 1F }
-        binding.appBarMain.contentMain.chipPages15.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 1.5F }
-        binding.appBarMain.contentMain.chipPages2.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 2F }
-        binding.appBarMain.contentMain.chipPages25.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 2.5F }
-        binding.appBarMain.contentMain.chipPages3.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 3F }
-        binding.appBarMain.contentMain.chipPages35.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 3.5F }
-        binding.appBarMain.contentMain.chipPages4.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 4F }
-        binding.appBarMain.contentMain.chipPages5.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 5F }
-        binding.appBarMain.contentMain.chipPages6.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 6F }
-        binding.appBarMain.contentMain.chipPages8.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 8F }
-        binding.appBarMain.contentMain.chipPages10.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = 10F }
+        val pageZoomLevels = arrayOf(1F, 1.5F, 2F, 2.5F, 3F, 3.5F, 4F, 5F, 6F, 8F, 10F)
+        val chipGroupPages = binding.appBarMain.contentMain.chipGroupPages
+        pageZoomLevels.forEach { pages ->
+            val chip = Chip(this)
+            chip.text = "$pages pages"
+            chip.isCheckable = true
+            chip.isChecked = (pages == pagesPerLandscape)
+            chip.setOnCheckedChangeListener { _, checked -> if (checked) pagesPerLandscape = pages }
+            chipGroupPages.addView(chip)
+        }
         binding.appBarMain.contentMain.chipAutoCrop.setOnCheckedChangeListener { _, checked ->
             renderAutoCrop = checked
             updatePresentations()
diff --git a/app/src/main/res/layout/content_main.xml b/app/src/main/res/layout/content_main.xml
index 4c58502..6b9201b 100644
--- a/app/src/main/res/layout/content_main.xml
+++ b/app/src/main/res/layout/content_main.xml
@@ -67,84 +67,6 @@
             android:layout_width="match_parent"
             android:layout_height="0dp"
             android:layout_weight="1">
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_1"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="1 page" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_1.5"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="1.5 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_2"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="2 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_2.5"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="2.5 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_3"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:checked="true"
-                android:text="3 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_3.5"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="3.5 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_4"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="4 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_5"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="5 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_6"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="6 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_8"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="8 pages" />
-
-            <com.google.android.material.chip.Chip
-                android:id="@+id/chip_pages_10"
-                android:checkable="true"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="10 pages" />
         </com.google.android.material.chip.ChipGroup>
 
         <com.google.android.material.chip.ChipGroup