<snapdata remixID="8825779"><project name="U2L4-brickwall" app="Snap! 5.1, http://snap.berkeley.edu" version="1"><notes></notes><thumbnail>data:image/png;base64,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</thumbnail><stage name="Stage" width="480" height="360" costume="0" color="255,255,255,1" tempo="60" threadsafe="false" volume="100" pan="0" lines="flat" ternary="true" codify="false" inheritance="false" sublistIDs="false" scheduled="false" id="1"><pentrails>data:image/png;base64,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world = stage.parentThatIsA(WorldMorph);&#xD;&#xD;if (tf != !!tf) return;&#xD;&#xD;try{&#xD;ide.savingPreferences = false;&#xD;&#xD;switch (which) {&#xD;    case &apos;Presentation mode&apos;:&#xD;        if (tf != ide.isAppMode) ide.toggleAppMode();&#xD;        break;&#xD;    case &apos;Retina display support&apos;:&#xD;        if (tf != isRetinaEnabled()) ide.toggleRetina();&#xD;        break;&#xD;    case &apos;Long form input dialog&apos;:&#xD;        if (tf != InputSlotDialogMorph.prototype.isLaunchingExpanded)&#xD;            ide.toggleLongFormInputDialog();&#xD;        break;&#xD;    case &apos;Plain prototype labels&apos;:&#xD;        if (tf != BlockLabelPlaceHolderMorph.prototype.plainLabel)&#xD;            ide.togglePlainPrototypeLabels();&#xD;        break;&#xD;    case &apos;Input sliders&apos;:&#xD;        MorphicPreferences.useSliderForInput = tf;&#xD;        break;&#xD;    case &apos;Execute on slider change&apos;:&#xD;        ArgMorph.prototype.executeOnSliderEdit = 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Process.prototype.enableSingleStepping)&#xD;            ide.toggleSingleStepping();&#xD;        break;&#xD;    case &apos;Thread safe scripts&apos;:&#xD;        stage.isThreadSafe = tf;&#xD;        break;&#xD;    case &apos;Prefer smooth animations&apos;:&#xD;        if (tf != (StageMorph.prototype.frameRate &gt; 0))&#xD;            ide.toggleVariableFrameRate();&#xD;        break;&#xD;    case &apos;Flat line ends&apos;:&#xD;        SpriteMorph.prototype.useFlatLineEnds = tf;&#xD;        break;&#xD;    case &apos;Codification support&apos;:&#xD;        if (tf != StageMorph.prototype.enableCodeMapping) {&#xD;            StageMorph.prototype.enableCodeMapping = tf;&#xD;            ide.currentSprite.blocksCache.variables = null;&#xD;            ide.currentSprite.paletteCache.variables = null;&#xD;            ide.refreshPalette();&#xD;        }&#xD;        break;&#xD;    case &apos;Inheritance support&apos;:&#xD;        if (tf != StageMorph.prototype.enableInheritance) {&#xD;            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