# Slide area
Here you can edit the currently selected slide (add/remove objects, change their size, add/edit text etc.)
# Slide boundaries
Common presentation apps use “Letterbox” and “Pillarbox” methods to fit slide background and content to the screen with different aspect ratio. It often causes black bars on the sides of the slide.
Unlike them SlideLab is fitting slide content and background separately, sometimes with different scale value. Content is scaled to fit the screen. Slide background is scaled and cropped to cover the whole screen. This approach provides better visual experience. No matter what kind of device is used to view a presentation, it will cover the whole screen without black bars.
You should place objects only within safe area to make sure they will not be cropped when they will be demonstrated on different devices or during export. Muted bands indicate the boundaries of the safe area.
# Scaling and scrolling slide
You can scroll slide:
- vertically with mouse wheel
- vertically and horizontally with mouse wheel over appropriate rulers
- in any direction with mouse combined with SPACE key
For zooming in or out you can use appropriate tool in toolbar, or mouse wheel combined with CTRL(META for MacOS) keys.
# Rulers and Guides
Rulers are located to the left and above the slide. They help you to move and resize objects with pixel-perfect precision. Ruler units are pixels.
You can show and hide rulers using View Menu.
You can use mouse wheel over a ruler to pan over the slide vertically and horizontally. Also you can place helping guides by click on a ruler. Make sure guides are enabled in View Menu.
If you want to move or delete a guide, just grab it over a ruler and drag to desired position or to the top-left corner to delete. While dragging a guide you will see a trash icon at the top-left corner. Drop a guide on this icon to delete it.