diff --git a/android-app-core/res/drawable-hdpi/plus.png b/android-app-core/res/drawable-hdpi/ab_add.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/plus.png
rename to android-app-core/res/drawable-hdpi/ab_add.png
diff --git a/android-app-core/res/drawable-hdpi/copy.png b/android-app-core/res/drawable-hdpi/ab_copy.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/copy.png
rename to android-app-core/res/drawable-hdpi/ab_copy.png
diff --git a/android-app-core/res/drawable-hdpi/ic_input_delete.png b/android-app-core/res/drawable-hdpi/ab_erase.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/ic_input_delete.png
rename to android-app-core/res/drawable-hdpi/ab_erase.png
diff --git a/android-app-core/res/drawable-hdpi/expand.png b/android-app-core/res/drawable-hdpi/ab_expand.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/expand.png
rename to android-app-core/res/drawable-hdpi/ab_expand.png
diff --git a/android-app-core/res/drawable-hdpi/stats.png b/android-app-core/res/drawable-hdpi/ab_graph.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/stats.png
rename to android-app-core/res/drawable-hdpi/ab_graph.png
diff --git a/android-app-core/res/drawable-hdpi/menu2.png b/android-app-core/res/drawable-hdpi/ab_menu.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/menu2.png
rename to android-app-core/res/drawable-hdpi/ab_menu.png
diff --git a/android-app-core/res/drawable-hdpi/paste.png b/android-app-core/res/drawable-hdpi/ab_paste.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/paste.png
rename to android-app-core/res/drawable-hdpi/ab_paste.png
diff --git a/android-app-core/res/drawable-hdpi/disk.png b/android-app-core/res/drawable-hdpi/ab_save.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/disk.png
rename to android-app-core/res/drawable-hdpi/ab_save.png
diff --git a/android-app-core/res/drawable-hdpi/settings.png b/android-app-core/res/drawable-hdpi/ab_settings.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/settings.png
rename to android-app-core/res/drawable-hdpi/ab_settings.png
diff --git a/android-app-core/res/drawable-hdpi/share.png b/android-app-core/res/drawable-hdpi/ab_share.png
similarity index 100%
rename from android-app-core/res/drawable-hdpi/share.png
rename to android-app-core/res/drawable-hdpi/ab_share.png
diff --git a/android-app-core/res/drawable-hdpi/kb_delete.png b/android-app-core/res/drawable-hdpi/kb_delete.png
deleted file mode 100644
index f02cef88..00000000
Binary files a/android-app-core/res/drawable-hdpi/kb_delete.png and /dev/null differ
diff --git a/android-app-core/res/drawable-ldpi/kb_delete.png b/android-app-core/res/drawable-ldpi/kb_delete.png
deleted file mode 100644
index 2403bbbd..00000000
Binary files a/android-app-core/res/drawable-ldpi/kb_delete.png and /dev/null differ
diff --git a/android-app-core/res/drawable-mdpi/plus.png b/android-app-core/res/drawable-mdpi/ab_add.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/plus.png
rename to android-app-core/res/drawable-mdpi/ab_add.png
diff --git a/android-app-core/res/drawable-mdpi/copy.png b/android-app-core/res/drawable-mdpi/ab_copy.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/copy.png
rename to android-app-core/res/drawable-mdpi/ab_copy.png
diff --git a/android-app-core/res/drawable-mdpi/ic_input_delete.png b/android-app-core/res/drawable-mdpi/ab_erase.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/ic_input_delete.png
rename to android-app-core/res/drawable-mdpi/ab_erase.png
diff --git a/android-app-core/res/drawable-mdpi/expand.png b/android-app-core/res/drawable-mdpi/ab_expand.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/expand.png
rename to android-app-core/res/drawable-mdpi/ab_expand.png
diff --git a/android-app-core/res/drawable-mdpi/stats.png b/android-app-core/res/drawable-mdpi/ab_graph.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/stats.png
rename to android-app-core/res/drawable-mdpi/ab_graph.png
diff --git a/android-app-core/res/drawable-mdpi/menu2.png b/android-app-core/res/drawable-mdpi/ab_menu.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/menu2.png
rename to android-app-core/res/drawable-mdpi/ab_menu.png
diff --git a/android-app-core/res/drawable-mdpi/paste.png b/android-app-core/res/drawable-mdpi/ab_paste.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/paste.png
rename to android-app-core/res/drawable-mdpi/ab_paste.png
diff --git a/android-app-core/res/drawable-mdpi/disk.png b/android-app-core/res/drawable-mdpi/ab_save.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/disk.png
rename to android-app-core/res/drawable-mdpi/ab_save.png
diff --git a/android-app-core/res/drawable-mdpi/settings.png b/android-app-core/res/drawable-mdpi/ab_settings.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/settings.png
rename to android-app-core/res/drawable-mdpi/ab_settings.png
diff --git a/android-app-core/res/drawable-mdpi/share.png b/android-app-core/res/drawable-mdpi/ab_share.png
similarity index 100%
rename from android-app-core/res/drawable-mdpi/share.png
rename to android-app-core/res/drawable-mdpi/ab_share.png
diff --git a/android-app-core/res/drawable-mdpi/kb_delete.png b/android-app-core/res/drawable-mdpi/kb_delete.png
deleted file mode 100644
index b6643eec..00000000
Binary files a/android-app-core/res/drawable-mdpi/kb_delete.png and /dev/null differ
diff --git a/android-app-core/res/drawable-xhdpi/plus.png b/android-app-core/res/drawable-xhdpi/ab_add.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/plus.png
rename to android-app-core/res/drawable-xhdpi/ab_add.png
diff --git a/android-app-core/res/drawable-xhdpi/copy.png b/android-app-core/res/drawable-xhdpi/ab_copy.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/copy.png
rename to android-app-core/res/drawable-xhdpi/ab_copy.png
diff --git a/android-app-core/res/drawable-xhdpi/ic_input_delete.png b/android-app-core/res/drawable-xhdpi/ab_erase.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/ic_input_delete.png
rename to android-app-core/res/drawable-xhdpi/ab_erase.png
diff --git a/android-app-core/res/drawable-xhdpi/expand.png b/android-app-core/res/drawable-xhdpi/ab_expand.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/expand.png
rename to android-app-core/res/drawable-xhdpi/ab_expand.png
diff --git a/android-app-core/res/drawable-xhdpi/stats.png b/android-app-core/res/drawable-xhdpi/ab_graph.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/stats.png
rename to android-app-core/res/drawable-xhdpi/ab_graph.png
diff --git a/android-app-core/res/drawable-xhdpi/menu2.png b/android-app-core/res/drawable-xhdpi/ab_menu.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/menu2.png
rename to android-app-core/res/drawable-xhdpi/ab_menu.png
diff --git a/android-app-core/res/drawable-xhdpi/paste.png b/android-app-core/res/drawable-xhdpi/ab_paste.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/paste.png
rename to android-app-core/res/drawable-xhdpi/ab_paste.png
diff --git a/android-app-core/res/drawable-xhdpi/disk.png b/android-app-core/res/drawable-xhdpi/ab_save.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/disk.png
rename to android-app-core/res/drawable-xhdpi/ab_save.png
diff --git a/android-app-core/res/drawable-xhdpi/settings.png b/android-app-core/res/drawable-xhdpi/ab_settings.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/settings.png
rename to android-app-core/res/drawable-xhdpi/ab_settings.png
diff --git a/android-app-core/res/drawable-xhdpi/share.png b/android-app-core/res/drawable-xhdpi/ab_share.png
similarity index 100%
rename from android-app-core/res/drawable-xhdpi/share.png
rename to android-app-core/res/drawable-xhdpi/ab_share.png
diff --git a/android-app-core/res/drawable-xhdpi/kb_delete.png b/android-app-core/res/drawable-xhdpi/kb_delete.png
deleted file mode 100644
index f5ca50ec..00000000
Binary files a/android-app-core/res/drawable-xhdpi/kb_delete.png and /dev/null differ
diff --git a/android-app-core/res/drawable-xlarge-hdpi/kb_delete.png b/android-app-core/res/drawable-xlarge-hdpi/kb_delete.png
deleted file mode 100644
index f5ca50ec..00000000
Binary files a/android-app-core/res/drawable-xlarge-hdpi/kb_delete.png and /dev/null differ
diff --git a/android-app-core/res/layout/cpp_simple_button_copy.xml b/android-app-core/res/layout/cpp_simple_button_copy.xml
index 601065eb..fdd2d978 100644
--- a/android-app-core/res/layout/cpp_simple_button_copy.xml
+++ b/android-app-core/res/layout/cpp_simple_button_copy.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app-core/res/layout/cpp_simple_button_erase.xml b/android-app-core/res/layout/cpp_simple_button_erase.xml
index feb9ad00..fd582b17 100644
--- a/android-app-core/res/layout/cpp_simple_button_erase.xml
+++ b/android-app-core/res/layout/cpp_simple_button_erase.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app-core/res/layout/cpp_simple_button_paste.xml b/android-app-core/res/layout/cpp_simple_button_paste.xml
index 14c31c5d..6e9f8d54 100644
--- a/android-app-core/res/layout/cpp_simple_button_paste.xml
+++ b/android-app-core/res/layout/cpp_simple_button_paste.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app-core/res/layout/cpp_simple_button_settings.xml b/android-app-core/res/layout/cpp_simple_button_settings.xml
index caf66fc5..8c802c1c 100644
--- a/android-app-core/res/layout/cpp_simple_button_settings.xml
+++ b/android-app-core/res/layout/cpp_simple_button_settings.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_app_button_copy.xml b/android-app/res/layout/cpp_app_button_copy.xml
index 124ce9d4..f61df90c 100644
--- a/android-app/res/layout/cpp_app_button_copy.xml
+++ b/android-app/res/layout/cpp_app_button_copy.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_app_button_erase.xml b/android-app/res/layout/cpp_app_button_erase.xml
index 9a06835f..84ce39fa 100644
--- a/android-app/res/layout/cpp_app_button_erase.xml
+++ b/android-app/res/layout/cpp_app_button_erase.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_app_button_paste.xml b/android-app/res/layout/cpp_app_button_paste.xml
index 7fc720b9..5181d986 100644
--- a/android-app/res/layout/cpp_app_button_paste.xml
+++ b/android-app/res/layout/cpp_app_button_paste.xml
@@ -8,6 +8,6 @@
\ No newline at end of file
diff --git a/android-app/res/layout/cpp_plot_function_list_item.xml b/android-app/res/layout/cpp_plot_function_list_item.xml
index d688501a..e1656688 100644
--- a/android-app/res/layout/cpp_plot_function_list_item.xml
+++ b/android-app/res/layout/cpp_plot_function_list_item.xml
@@ -31,6 +31,6 @@
a:paddingTop="0dp"
a:paddingBottom="0dp"
a:scaleType="centerInside"
- a:src="@drawable/settings" />
+ a:src="@drawable/ab_settings" />
\ No newline at end of file
diff --git a/android-app/res/menu/functions_menu.xml b/android-app/res/menu/functions_menu.xml
index 9de835f7..b56037f9 100644
--- a/android-app/res/menu/functions_menu.xml
+++ b/android-app/res/menu/functions_menu.xml
@@ -11,6 +11,6 @@
\ No newline at end of file
diff --git a/android-app/res/menu/plot_menu.xml b/android-app/res/menu/plot_menu.xml
index 6b4ba92d..c186b6ac 100644
--- a/android-app/res/menu/plot_menu.xml
+++ b/android-app/res/menu/plot_menu.xml
@@ -11,37 +11,37 @@
\ No newline at end of file
diff --git a/android-app/res/menu/vars_menu.xml b/android-app/res/menu/vars_menu.xml
index adb415a9..c1dd8388 100644
--- a/android-app/res/menu/vars_menu.xml
+++ b/android-app/res/menu/vars_menu.xml
@@ -11,6 +11,6 @@
\ No newline at end of file