How re-enable design palette in Android Studio

I recently made the switch to Android Studio as my default IDE for Android development. When designing my UI I normally use the palette in the design view to assist in arranging the widget on the preview screen.Recently something weird happened, It just disappeared and I can't seem to re-enable it. Normally I would see the little Palette button on the side but now its gone. When I open another project I see the palette but not show this current project I'm working on.

When I open another project in Android Studio I see the palette tab.

I've just figured this out! If you double click on your .xml file tab at the top it will maximize the designer window. Then on the left you can drag the window to shrink and it will reveal the palette. Then just click on the tab on the left to open the project window.