Slide Editor | Design

The Design tab, and the Slide Master view that edits what every slide inherits.

Themes and variants

Seven built-in themes (SlideThemeDefinition.BuiltIn), each with colour variants. Applying one rewrites the theme part’s colour scheme and major/minor fonts, so every placeholder and theme-coloured shape in the deck follows — in PowerPoint too.

var c = editor.Controller!;

c.ApplyTheme(SlideThemeDefinition.BuiltIn[2]);
c.ApplyColorVariant(variant);

Where a theme names a font the platform does not have, a similar face is substituted — ending on the bundled Carlito or Caladea, so a browser (which has no system fonts) still sets the theme in a proportional face of the right kind rather than the monospace fallback.

A slide with no background written anywhere paints the theme’s first background colour (bg1), as PowerPoint does — which is what makes a dark theme’s slides dark.

Slide size

16:9, 4:3 or custom. The content scales with the slide.

c.SetSlideSize(1280, 720);   // 16:9; 960 x 720 is 4:3

Format background

Solid, gradient or picture, for this slide or all slides; Reset goes back to what the layout and master give.

c.SetBackground(background, applyToAll: false);   // a SlideBackgroundSpec
c.ResetBackground();

Slide Master

View ▸ Slide Master opens the master and its layouts, with a contextual Slide Master tab. Edit the text styles and backgrounds there and they are saved back to the master and layout parts, so every slide using them changes.

c.ViewMode = SlideEditorViewMode.SlideMaster;
c.Master;   // the master being edited

Dark mode

The app’s light/dark theme reaches only the editor’s surround and chrome; the slides show the deck’s own theme. Theme pins the editor light or dark regardless of the app.