When you create a new Storyline 360 project, the best time to set the slide size is before adding content. You can set it to any size you like, but the default is 720 pixels wide by 540 pixels high. You can also define default slide dimensions for new projects. Keep reading to learn how slide sizing works. Then, discover why the size of your published project could vary depending on the player.

• How to Change Your Slide Size
• How Player Features Affect Published Size

How to Change Your Slide Size

If you don’t want to use the default slide size, here’s how to change it:

1. Go to the Design tab on the ribbon and click Slide Size. Or, click the slide size dimensions link in the lower-left corner. 
2. When the Slide Size window appears, choose an option from the Preset selector.
   • Choose 4:3 (720x540) for a fullscreen slide.
   • Choose 16:9 (960x540) for a widescreen slide.
   • Choose Custom to enter the width and height in pixels, up to a maximum of 2,047 x 2,047.
3. Use other options in the Slide Size window to control aspect ratio and proportion if you’re working with existing content.
   • Mark the Lock aspect ratio box to maintain the current proportions for objects with locked aspect ratios when resizing. 
   • Mark the box labeled Scale existing content to fit if you have slide content that you want to fit proportionately within the new size. Objects that have locked aspect ratios will maintain their ratios. Objects that don’t have locked aspect ratios may change shape, depending on the slide size you choose.
4. To save the chosen dimensions as the default slide size for new projects, click Set As Default Size. (The button is grayed out for the current default slide dimensions.) Your new default slide size takes effect when you close Storyline 360.
5. Click OK to accept the new slide size. 

How Player Features Affect Published Size

The overall size of your published output will be slightly larger than your slide dimensions. That’s because the player (the interface around the perimeter of your slides) adds some width and height.

The player can add up to 260 pixels to the width and up to 118 pixels to the height, depending on which player features you choose. You can enable and disable player features on a slide by slide basis, but the course size will remain the same for all slides. In other words, each player feature can contribute width or height to your published course, even if it’s only used on a single slide.

Here’s a more detailed look at how player features affect the width and height of your published course.

Width

These player features increase the overall width:

• Player frame (with or without player features): +20 pixels
• Sidebar: +240 pixels

The maximum possible width increase is 260 pixels.

Height

These player features increase the overall height:

• Player frame (with or without player features): +20 pixels
• Title: +23 pixels
• One or more topbar tabs: +24 pixels
• Volume controller, seekbar, or navigation buttons: +51 pixels

The maximum possible height increase is 118 pixels.

Note: When menus and controls are turned off, the modern player style doesn’t add any width or height to your course.

Example: Calculating Your Published Course Dimensions

Let’s say your slide size is 720 x 405, and you enable the navigation buttons and sidebar. The overall dimensions of your course will be 980 x 476 once published. Here’s the breakdown:

Width

• Slide size: 720 pixels
• Player frame: +20 pixels
• Sidebar: +240 pixels

The published course will be 980 pixels wide.

Height

• Slide height: 405 pixels
• Player frame: +20 pixels
• Navigation buttons: +51 pixels

The published course will be 476 pixels high.