Added string descriptions.

Change-Id: I4f56e33d88edbf839917687a35bdbf534e78d03d
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 2e533a2..12a76c5 100755
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -2,51 +2,81 @@
 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
     <string name="app_name">Movie Studio</string>
 
+    <!-- Displayed in the center of the activity while a project is loading. -->
     <string name="editor_loading_project">Loading project...</string>
+    <!-- Displayed in the center of the activity if a project could not be loaded. -->
     <string name="editor_no_project">No project found</string>
-    <string name="editor_open_project">Projects</string>
+    <!-- Menu item used to launch the Gallery video clip picker. -->
     <string name="editor_import_video">Import video clip</string>
+    <!-- Menu item used to launch the Gallery image picker. -->
     <string name="editor_import_image">Import image</string>
+    <!-- Menu item used to launch the Music song picker. -->
     <string name="editor_import_audio">Import music</string>
+    <!-- Menu item used to share the movie (e.g. to YouTube). -->
     <string name="editor_share_movie">Share movie</string>
+    <!-- Menu item used to export the movie. -->
     <string name="editor_export_movie">Export movie</string>
+    <!-- Menu item used to play the exported movie. -->
     <string name="editor_play_exported_movie">Play exported movie</string>
-    <string name="editor_storage_not_available">The project cannot be created. Storage not accessible.</string>
+    <!-- Menu item used to change the aspect ratio of the movie. -->
     <string name="editor_change_aspect_ratio">Change aspect ratio</string>
+    <!-- Menu item used to change the project name. -->
     <string name="editor_edit_project_name">Change project name</string>
+    <!-- Menu item used to delete the project. -->
     <string name="editor_delete_project">Delete project</string>
+    <!-- Text displayed in the delete project confirmation dialog. -->
     <string name="editor_delete_project_question">Do you want to delete this project?</string>
+    <!-- Text displayed in the playback widget to indicate the current playhead time position [CHAR_LIMIT=11] -->
     <string name="editor_zero_time_stamp">00:00:00.0</string>
+    <!-- Text displayed in the remove audio track confirmation dialog. -->
     <string name="editor_remove_audio_track_question">Do you want to remove this audio track?</string>
+    <!-- Menu item used to change the overlay text. -->
     <string name="editor_edit_overlay">Edit</string>
+    <!-- Text displayed in the remove overlay confirmation dialog. -->
     <string name="editor_remove_overlay_question">Do you want to remove this overlay?</string>
+    <!-- Menu item used to change the rendering mode. Launches a single choice dialog. -->
     <string name="editor_change_rendering_mode">Change rendering mode</string>
+    <!-- Text displayed in the remove transition confirmation dialog. -->
     <string name="editor_remove_transition_question">Do you want to remove this transition?</string>
+    <!-- Text displayed in the remove effect confirmation dialog. -->
     <string name="editor_remove_effect_question">Do you want to remove this effect?</string>
+    <!-- Text displayed in the remove video clip confirmation dialog. -->
     <string name="editor_remove_video_question">Do you want to remove this video clip?</string>
+    <!-- Text displayed in the remove image confirmation dialog. -->
     <string name="editor_remove_image_question">Do you want to remove this image?</string>
+    <!-- Menu item used to add an effect. -->
     <string name="editor_add_effect">Add effect</string>
+    <!-- Menu item used to change an effect type and/or duration. -->
     <string name="editor_change_effect">Change effect</string>
+    <!-- Menu item used to remove an effect. -->
     <string name="editor_remove_effect">Remove effect</string>
+    <!-- Menu item used to add a new title (overlay title). -->
     <string name="editor_add_overlay">Add title</string>
+    <!-- Menu item used to add a transition at the beginning of the image or video clip. -->
     <string name="editor_add_begin_transition">Add beginning transition</string>
+    <!-- Menu item used to add a transition at the end of the image or video clip. -->
     <string name="editor_add_end_transition">Add ending transition</string>
+    <!-- Menu item used to change a transition type and/or duration. -->
     <string name="editor_change_transition">Change transition</string>
-    <string name="editor_transition_too_short">Cannot add a transition. The transition would be too short.</string>
-
 
     <!-- Audio tracks -->
+    <!-- Enable looping for the audio track. -->
     <string name="editor_enable_loop_audio_track">Loop</string>
+    <!-- Disable looping for the audio track. -->
     <string name="editor_disable_loop_audio_track">Don\'t loop</string>
+    <!-- Mute the audio track. -->
     <string name="editor_mute">Mute</string>
+    <!-- Unmute the audio track. -->
     <string name="editor_unmute">Unmute</string>
-    
+
     <!-- Projects activity -->
-    <string name="projects_no_projects_found">No projects found</string>
+    <!-- Menu item and text displayed in the carousel new project item. [CHAR_LIMIT=16]-->
     <string name="projects_new_project">New project</string>
+    <!-- Text displayed in the project name dialog title. -->
     <string name="projects_project_name">Project name</string>
 
     <!-- Aspect ratio labels -->
+    <!-- Menu item aspect ratios are displayed in a single item select dialog. -->
     <string name="aspect_ratio_11_9">11 x 9</string>
     <string name="aspect_ratio_16_9">16 x 9</string>
     <string name="aspect_ratio_3_2">3 x 2</string>
@@ -54,111 +84,194 @@
     <string name="aspect_ratio_5_3">5 x 3</string>
 
     <!-- Error messages -->
+    <!-- Error message displayed in a toast if a project cannot be created because the storage is not accessible. -->
+    <string name="editor_storage_not_available">The project cannot be created. Storage not accessible.</string>
+    <!-- Error message displayed in a toast if a project cannot be created. -->
     <string name="editor_create_error">An error occurred. The project cannot be created.</string>
+    <!-- Error message displayed in a toast if a project cannot be loaded. -->
     <string name="editor_load_error">An error occurred. The project cannot be loaded. Do you want to delete this project?</string>
+    <!-- Error message displayed in a toast if the aspect ratio cannot be changed. -->
     <string name="editor_aspect_ratio_error">The aspect ratio cannot be changed.</string>
+    <!-- Error message displayed in a toast if a theme cannot be applied. -->
     <string name="editor_apply_theme_error">The theme cannot be applied.</string>
+    <!-- Error message displayed in a toast if a movie cannot be applied. -->
     <string name="editor_export_error">An error occurred. The movie cannot be exported.</string>
+    <!-- Error message displayed in a toast if a project cannot be saved. -->
     <string name="editor_saved_error">The project cannot be saved.</string>
+    <!-- Error message displayed in a toast if an error had occurred while releasing the project. -->
     <string name="editor_release_error">An error occurred while releasing the project.</string>
+    <!-- Error message displayed in a toast if an error had occurred while releasing the project. -->
     <string name="editor_delete_error">An error occurred while deleting the project.</string>
+    <!-- Error message displayed in a toast if an error occurs if a video clip cannot be added to the project. -->
     <string name="editor_add_video_clip_error">The video clip cannot be added to your project.</string>
+    <!-- Error message displayed in a toast if an error occurs if an image cannot be added to the project. -->
     <string name="editor_add_image_error">The image cannot be added to your project.</string>
-    <string name="editor_add_media_items_error">The items cannot be added to your project.</string>
+    <!-- Error message displayed in a toast if video clip or an image cannot be moved in the timeline. -->
     <string name="editor_move_media_item_error">The item cannot be moved.</string>
+    <!-- Error message displayed in a toast if video clip or image cannot be removed from the timeline. -->
     <string name="editor_remove_media_item_error">The item cannot be removed.</string>
+    <!-- Error message displayed in a toast if the rendering mode of an image/video clip cannot be changed. -->
     <string name="editor_set_rendering_mode_error">Rendering mode cannot be set.</string>
+    <!-- Error message displayed in a toast if the image duration cannot be changed. -->
     <string name="editor_set_media_item_duration_error">Cannot set the image duration.</string>
+    <!-- Error message displayed in a toast if a video clip cannot be trimmed. -->
     <string name="editor_set_media_item_boundaries_error">Cannot set the video clip boundaries.</string>
+    <!-- Error message displayed in a toast if a transition cannot be added. -->
     <string name="editor_add_transition_error">The transition cannot be added.</string>
+    <!-- Error message displayed in a toast if a transition cannot be removed. -->
     <string name="editor_remove_transition_error">The transition cannot be removed.</string>
+    <!-- Error message displayed in a toast if a transition duration cannot be changed. -->
     <string name="editor_set_transition_duration_error">Cannot set the transition duration.</string>
+    <!-- Error message displayed in a toast if an overlay cannot be added. -->
     <string name="editor_add_overlay_error">The overlay cannot be added.</string>
+    <!-- Error message displayed in a toast if an overlay cannot be removed. -->
     <string name="editor_remove_overlay_error">The overlay cannot be removed.</string>
+    <!-- Error message displayed in a toast if an overlay duration cannot be changed. -->
     <string name="editor_set_duration_overlay_error">The overlay duration was not set.</string>
+    <!-- Error message displayed in a toast if an overlay start time cannot be changed. -->
     <string name="editor_set_start_time_overlay_error">The overlay start time was not set.</string>
+    <!-- Error message displayed in a toast if an overlay text cannot be changed. -->
     <string name="editor_set_user_attributes_overlay_error">Cannot set overlay attributes.</string>
+    <!-- Error message displayed in a toast if an effect cannot be added. -->
     <string name="editor_add_effect_error">The effect cannot be added.</string>
+    <!-- Error message displayed in a toast if an effect cannot be removed. -->
     <string name="editor_remove_effect_error">The effect cannot be removed.</string>
+    <!-- Error message displayed in a toast if an audio track cannot be added. -->
     <string name="editor_add_audio_track_error">Audio track cannot be added</string>
+    <!-- Error message displayed in a toast if an audio track cannot be removed. -->
     <string name="editor_remove_audio_track_error">Audio track cannot be removed.</string>
+    <!-- Error message displayed in a toast if an audio track cannot be trimmed. -->
     <string name="editor_set_audio_track_boundaries_error">Audio track cannot be trimmed.</string>
+    <!-- Error message displayed in a toast if a transition cannot be added. -->
+    <string name="editor_transition_too_short">Cannot add a transition. The transition would be too short.</string>
  
      <!-- Export options dialog-->
+    <!-- The title of the export dialog. -->
     <string name="export_dialog_export">Export</string>
+    <!-- The label of the movie size spinner. -->
     <string name="export_dialog_movie_size">Movie size</string>
+    <!-- The label of the movie quality spinner. -->
     <string name="export_dialog_movie_quality">Movie quality</string>
+    <!-- The low quality option. -->
     <string name="export_dialog_movie_quality_low">Low</string>
+    <!-- The medium quality option. -->
     <string name="export_dialog_movie_quality_medium">Medium</string>
+    <!-- The high quality option. -->
     <string name="export_dialog_movie_quality_high">High</string>
  
     <!-- Pan and zoom activity-->
+    <!-- The title of the Pan & zoom activity. -->
     <string name="pan_zoom_title">Pan &amp; zoom effect</string>
+    <!-- The label for the start rectangle checkbox. -->
     <string name="pan_zoom_start">Start</string>
+    <!-- The label for the end rectangle checkbox. -->
     <string name="pan_zoom_end">End</string>
  
     <!-- Themes names and titles-->
+    <!-- The label/name for Theme 1. -->
     <string name="theme_name_travel">Travel</string>
+    <!-- The sample title for Theme 1. -->
     <string name="theme_travel_title">My trip to California</string>
+    <!-- The sample subtitle for Theme 1. -->
     <string name="theme_travel_subtitle">San Francisco</string>
+    <!-- The label/name for Theme 2. -->
     <string name="theme_name_surfing">Surfing</string>
+    <!-- The sample title for Theme 2. -->
     <string name="theme_surfing_title">My surfing adventure</string>
+    <!-- The sample subtitle for Theme 2. -->
     <string name="theme_surfing_subtitle">SF Bay</string>
+    <!-- The label/name for Theme 3. -->
     <string name="theme_name_film">Film</string>
+    <!-- The sample title for Theme 3. -->
     <string name="theme_film_title">My short movie</string>
+    <!-- The sample subtitle for Theme 3. -->
     <string name="theme_film_subtitle">Fun on the Bay</string>
+    <!-- The label/name for Theme 4. -->
     <string name="theme_name_rock_and_roll">Rock and roll</string>
+    <!-- The sample title for Theme 4. -->
     <string name="theme_rock_and_roll_title">The concert</string>
+    <!-- The sample subtitle for Theme 4. -->
     <string name="theme_rock_and_roll_subtitle">Two and a half barrels</string>
 
     <!-- Overlay names-->
+    <!-- The overlay type 1 name -->
     <string name="overlay_preview_center">Centered title</string>
+    <!-- The overlay type 2 name -->
     <string name="overlay_preview_bottom">Bottom title</string>
 
     <!-- Overlay sample titles-->
+    <!-- The label/name for overlay 1. -->
     <string name="overlay_title">Title</string>
+    <!-- The sample title for overlay 1. -->
     <string name="overlay_title_sample">My trip</string>
+    <!-- The sample subtitle for overlay 1. -->
     <string name="overlay_subtitle_sample">San Francisco</string>
 
     <!-- Overlay title activity EditText labels -->
+    <!-- The dialog label for the overlay name. -->
     <string name="overlays_select_type">Select title template</string>
+    <!-- The dialog label for the overlay sample title. -->
     <string name="overlay_title_label">Title</string>
+    <!-- The dialog label for the overlay sample subtitle. -->
     <string name="overlay_subtitle_label">Subtitle</string>
 
     <!-- Effect names-->
+    <!-- The effects selection dialog title. -->
     <string name="effects_select_effect">Effects</string>
+    <!-- Effect 1 name. -->
     <string name="effect_pan_zoom">Pan &amp; zoom effect</string>
+    <!-- Effect 2 name. -->
     <string name="effect_gradient">Gradient effect</string>
+    <!-- Effect 3 name. -->
     <string name="effect_sepia">Sepia effect</string>
+    <!-- Effect 4 name. -->
     <string name="effect_negative">Negative effect</string>
+    <!-- Effect 5 name. -->
     <string name="effect_fifties">Fifties effect</string>
 
     <!-- Transition names-->
+    <!-- The transition selection dialog title. -->
     <string name="transitions_select_transition">Select transition</string>
+    <!-- The name of the transition using a contour alpha mask. -->
     <string name="transitions_alpha_countour">Contour alpha</string>
+    <!-- The name of the transition using a diagonal alpha mask. -->
     <string name="transitions_alpha_diagonal">Diagonal alpha</string>
+    <!-- The name of the crossfade transition. -->
     <string name="transitions_crossfade">Crossfade</string>
+    <!-- The name of the fade to and from black transition. -->
     <string name="transitions_fade_black">Fade to and from black</string>
+    <!-- The name of the left to right transition. -->
     <string name="transitions_sliding_right_out_left_in">Sliding right out left in</string>
+    <!-- The name of the right to left transition. -->
     <string name="transitions_sliding_left_out_right_in">Sliding left out right in</string>
+    <!-- The name of the bottom to top transition. -->
     <string name="transitions_sliding_top_out_bottom_in">Sliding top out bottom in</string>
+    <!-- The name of the top to bottom transition. -->
     <string name="transitions_sliding_bottom_out_top_in">Sliding bottom out top in</string>
+    <!-- The text which displays the duration of a transition as a decimal number (e.g. "1.5 sec"). -->
     <string name="transitions_duration"><xliff:g id="seconds">%(,.1f</xliff:g> sec</string>
 
-    <!-- Rendering modes-->
+    <!-- Rendering modes displayed in the single choice selection dialog-->
+    <!-- The black borders rendering mode. -->
     <string name="rendering_mode_black_borders">Black borders</string>
-    <string name="rendering_mode_stretch">Stretch</string>
+    <!-- The stretch to fit rendering mode. -->
+    <string name="rendering_mode_stretch">Stretch to fit</string>
+    <!-- The cropping rendering mode. -->
     <string name="rendering_mode_crop">Crop</string>
 
     <!-- Generic strings-->
+    <!-- Displayed in dialog buttons. -->
     <string name="yes">Yes</string>
+    <!-- Displayed in dialog buttons. -->
     <string name="no">No</string>
+    <!-- Displayed in dialog buttons. -->
     <string name="done">Done</string>
+    <!-- Displayed in dialog buttons and menu items. -->
     <string name="remove">Remove</string>
-    <string name="loading">Loading...</string>
+    <!-- Displayed in the carousel if the project does not have a name. -->
     <string name="untitled">Untitled</string>
 
-    <!-- Time -->
+    <!-- Time related format strings displayed in the carousel below the project preview -->
     <string name="hours_and_minutes"><xliff:g id="hours">%d</xliff:g> hrs <xliff:g id="minutes">%d</xliff:g> mins</string>
     <string name="hour_and_minutes">1 hr <xliff:g id="minutes">%d</xliff:g> mins</string>
     <string name="minutes"><xliff:g id="minutes">%d</xliff:g> mins</string>