diff --git a/README.md b/README.md
index fa107a2..8a2f239 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ No, I'm building a tool that does the bare minimum what I require and what I don
 find in other open source tools. That doesn't mean of course that contributions
 related to Photoshop-esque features aren't welcomed.
 
-### All self-written ?
+### All hand-written ?
 
 Yep, though it helps having worked in the photo software industry for five years, having
 tackled the problems before. Also, Bitmappery is reusing [zCanvas](https://github.com/igorski/zCanvas)
@@ -25,6 +25,23 @@ BitMappery does however make use of the following excellent libraries to speed u
 * UI Essentials by [www.wishforge.games](https://freeicons.io/profile/2257)
 * Black arrow icons set by [Reda](https://freeicons.io/profile/6156)
 
+## Model
+
+BitMappery works with entities known as _Documents_. A Document contains several _Layer_s, each of
+which define their content, transformation, _Effect_s, etc. Each of the nested entity properties
+has its own factory (see _@/src/factories/_). The Document is managed by the Vuex _document-module.js_.
+
+## Document rendering and interactions
+
+The Document is rendered one layer at a time onto a Canvas element, using [zCanvas](https://github.com/igorski/zCanvas). Both the rendering and interaction handling is performed by _@/src/components/ui/zcanvas/layer_sprite.js_.
+Note that the purpose of the renderer is solely to delegate interactions events to the Layer entity. The
+renderer should represent the properties of the Layer, the Layer should never reverse-engineer from the onscreen
+content (especially as different window size and scaling factor will greatly complicate these matters when
+performed two-way).
+
+Rendering transformations, text and effects is an asynchronous operation handled by _@/src/services/render-service.js_. The purpose of this service is to perform and cache repeated operations and eventually maintain
+the source bitmap represented by the _layer-sprite.js_.
+
 ## Dropbox integration
 
 Requires you to [register a client id or access token](https://www.dropbox.com/developers/apps).
@@ -56,7 +73,10 @@ npm run lint
 
 # TODO / Roadmap
 
+* Implement iframe based rendering (as more compatible alternative to OffscreenCanvas) for effects
+* Implement action queue when drawing, only execute drawing on update() hook
 * Implement loaders on document load/save, image export and dropbox import
+* Maintain cache for transformations and filters, rendered at the display destination size (invalidate on window resize)
 * Drawing masks on a rotated layer that is panned (or mirrored) is broken
 * Dragging of masks on rotated/mirror content is kinda broken
 * Restoring of document with rotated layers (smaller than document size) restores at incorrect offset
diff --git a/src/components/application-menu/application-menu.vue b/src/components/application-menu/application-menu.vue
index 5e33245..860d9c9 100644
--- a/src/components/application-menu/application-menu.vue
+++ b/src/components/application-menu/application-menu.vue
@@ -65,7 +65,7 @@
                         <button v-t="'exportDocument'"
                                 type="button"
                                 :disabled="noDocumentsAvailable"
-                                @click="requestDocumentSave()"
+                                @click="requestDocumentExport()"
                         ></button>
                     </li>
                     <li>
@@ -240,7 +240,7 @@ export default {
         requestDocumentResize() {
             this.openModal( RESIZE_DOCUMENT );
         },
-        requestDocumentSave() {
+        requestDocumentExport() {
             this.openModal( EXPORT_DOCUMENT );
         },
         requestSelectionLoad() {
diff --git a/src/services/keyboard-service.js b/src/services/keyboard-service.js
index f2d55aa..ba6e8dc 100644
--- a/src/services/keyboard-service.js
+++ b/src/services/keyboard-service.js
@@ -20,10 +20,11 @@
  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
-import { ADD_LAYER }  from "@/definitions/modal-windows";
 import { LAYER_TEXT } from "@/definitions/layer-types";
 import ToolTypes, { MAX_BRUSH_SIZE, MIN_ZOOM, MAX_ZOOM, canDraw } from "@/definitions/tool-types";
-import { DROPBOX_FILE_SELECTOR, SAVE_DROPBOX_DOCUMENT } from "@/definitions/modal-windows";
+import {
+    ADD_LAYER, EXPORT_DOCUMENT, DROPBOX_FILE_SELECTOR, SAVE_DROPBOX_DOCUMENT
+} from "@/definitions/modal-windows";
 import { getCanvasInstance, getSpriteForLayer } from "@/factories/sprite-factory";
 
 let state, getters, commit, dispatch, listener,
@@ -208,7 +209,9 @@ function handleKeyDown( event ) {
             break;
 
         case 69: // E
-            if ( canDraw( getters.activeDocument, getters.activeLayer )) {
+            if ( hasOption ) {
+                openModal( EXPORT_DOCUMENT );
+            } else if ( canDraw( getters.activeDocument, getters.activeLayer )) {
                 setActiveTool( ToolTypes.ERASER );
             }
             break;
@@ -220,14 +223,16 @@ function handleKeyDown( event ) {
             break;
 
         case 73: // I
-            if ( getters.activeLayer ) {
+            if ( hasOption ) {
+                dispatch( "loadDocument" );
+            } else if ( getters.activeLayer ) {
                 setActiveTool( ToolTypes.EYEDROPPER );
             }
             break;
 
         case 76: // L
             if ( hasOption && shiftDown ) {
-                commit( "openModal", ADD_LAYER );
+                openModal( ADD_LAYER );
             } else {
                 commit( "setActiveTool", { tool: ToolTypes.LASSO })
                 setActiveTool( ToolTypes.LASSO );
@@ -251,7 +256,7 @@ function handleKeyDown( event ) {
         case 79: // O
             if ( hasOption ) {
                 if ( state.dropboxConnected ) {
-                    commit( "openModal", DROPBOX_FILE_SELECTOR );
+                    openModal( DROPBOX_FILE_SELECTOR );
                 }
                 preventDefault( event );
             }
@@ -264,7 +269,7 @@ function handleKeyDown( event ) {
         case 83: // S
             if ( hasOption ) {
                 if ( getters.activeDocument && state.dropboxConnected ) {
-                    commit( "openModal", SAVE_DROPBOX_DOCUMENT );
+                    openModal( SAVE_DROPBOX_DOCUMENT );
                 }
                 preventDefault( event ); // page save
             }
@@ -388,3 +393,7 @@ function preventDefault( event ) {
 function setActiveTool( tool ) {
     commit( "setActiveTool", { tool, activeLayer: getters.activeLayer });
 }
+
+function openModal( modal ) {
+    commit( "openModal", modal );
+}