If you're presenting on a widescreen display (16:9), it's likely that you will have black bars on the left and right, framing your slides.
This is because the iPad (where our app began) has fullscreen dimensions (4:3), and Haiku Deck currently generates decks with slides featuring those dimensions.
There is a workaround when you export your deck to .pptx format and open it in another app like PowerPoint or Keynote. See the instructions below for working around this in PowerPoint.
change haiku deck to 16:9 widescreen format - Created with Haiku Deck, presentation software that inspires;
Steps for Keynote 6.0 or higher:
1. From the download menu in Haiku Deck (square icon with an arrow pointing down), choose pptx.
2. Open the .pptx file in Keynote.
3. Click the DOCUMENT button in the upper right corner of the window.
4. Single-click the image on your slide to select it.
5. Choose the Arrange tab below the Format/Animate/Document buttons.
6. Un-check the Constrain Proportions box in the format tools on the right. This step tells Keynote that later, when you resize your slide's dimensions, the image can resize along with it. It prevents you from having to manually resize each image later.
8. Repeat steps 6 & 7 for each slide in your deck.
9. Click the Document button in the top right.
10. Make sure the Document tab is selected, then look for the Slide Size drop-down menu. From there, you can change your presentation size to 16:9.